ROSEMOUNT INC. Patent applications |
Patent application number | Title | Published |
20160094020 | TERMINAL FEEDTHROUGH - A terminal feedthrough is provided. The terminal feedthrough includes a terminal pin insert having a pair of ends. A polymeric body having an externally threaded region is disposed about the terminal pin insert to form an interface with the terminal pin insert. At least one of threads of the externally threaded region and a cylindrical pin interface is configured to provide a flame-quenching pathway. | 03-31-2016 |
20160091353 | MAGNETIC FLOWMETER FLOWTUBE WITH PROCESS FLUID VENTING ASSEMBLY - A magnetic flowmeter flowtube assembly includes a conduit having an inside diameter, a fluoropolymer liner disposed within and extending through the conduit, and a pair of electrodes mounted relative to the liner to measure a voltage induced within a process fluid flowing through the liner. A venting assembly provides a process fluid vent path from the inside diameter of the conduit to an exterior of the flowtube assembly. | 03-31-2016 |
20150316528 | SINGLE-USE BIOREACTOR SENSOR ARCHITECTURE - A sensor assembly includes a first sensor and a second sensor. An enclosure is operably coupled to each of the first and second sensors and contains memory that stores compensation data for each of the first and second sensors. A connector is operably coupled to the first and second sensors. A bioreaction sensing assembly as well as a method of manufacturing the bioreaction sensing assembly is also provided. | 11-05-2015 |
20150276528 | SPAN LINE PRESSURE EFFECT COMPENSATION FOR DIAPHRAGM PRESSURE SENSOR - A differential pressure sensor for sensing a differential pressure of a process fluid, includes a sensor body having a sensor cavity formed therein with a cavity profile. A diaphragm in the sensor cavity deflects in response to an applied differential pressure. The diaphragm has a diaphragm profile. A gap formed between the cavity profile and the diaphragm profile changes as a function of the differential pressure. At least one of the cavity profile and diaphragm profile changes as a function of a line pressure to compensate for changes in the gap due to deformation of the sensor body from the line pressure. | 10-01-2015 |
20150276492 | PROCESS TEMPERATURE MEASUREMENT USING INFRARED DETECTOR - A process variable transmitter for measuring a temperature in an industrial process includes an infrared detector arranged to receive infrared radiation from a component in the industrial process. A memory contains temperature characterization information which relates the infrared radiation received from the component with an internal temperature of the component. Measurement circuitry is configured to determine the internal temperature of the component based upon the received infrared radiation from the component and the temperature characterization information. | 10-01-2015 |
20150276491 | PROCESS CONDUIT ANOMALY DETECTION USING THERMAL IMAGING - A diagnostic field device for detecting a condition of a process conduit includes an infrared detector comprising a plurality of pixels configured to receive infrared radiation from the process conduit and responsively provide a plurality of pixel outputs. A first pixel of the plurality of pixels is configured to receive infrared radiation from a first location on the process conduit. A second pixel of the plurality of pixels is configured to receive infrared radiation from a second location on the process conduit. A memory contains thermal profile information which relates an output from the first pixel to a first temperature at the first location and relates an output from the second pixel to a second temperature at the second location. A microprocessor identifies a process anomaly based upon outputs from the first and second pixels. Output circuitry provides a diagnostic output indicative of the identified process anomaly. | 10-01-2015 |
20150276444 | HIGH PRESSURE WAFER STYLE MAGNETIC FLOWMETER - A wafer-type electromagnetic flow sensor includes a single-piece chassis having a pair of faces and a flow conduit extending between the pair of faces. Each face of the chasses includes a feature configured to engage a metal sealing ring. A non-conductive liner is disposed in the flow conduit of the single-piece chassis. A plurality of electromagnetic coils is configured to generate a flux into process fluid flowing through the flow conduit. A pair of electrodes is configured to electrically couple to the process fluid. A feedthrough assembly is configured to maintain process fluid pressure while allowing a plurality of electrical conductors to pass therethrough. | 10-01-2015 |
20150276432 | PROCESS VARIABLE TRANSMITTER WITH LOOP-POWERED WIRELESS TRANSCEIVER - A process variable transmitter includes transmitter circuitry for determining a process variable from a sensor signal produced using a process sensor. The transmitter circuitry has at least one operating parameter. The process variable transmitter also includes a wireless communication module configured to be powered by a two-wire process control loop. The wireless communication module is capable of communicating wirelessly with a general-purpose mobile device using a general-purpose wireless communication standard such that the wireless communication module can instruct the transmitter circuitry to change a value of the at least one operating parameter based on a wireless message received from the general-purpose mobile device. | 10-01-2015 |
20150268111 | PROCESS VARIABLE TRANSMITTER WITH PROCESS VARIABLE SENSOR CARRIED BY PROCESS GASKET - A process variable transmitter for sensing a process variable of process fluid in an industrial process includes a process gasket having a surface configured to form a seal with a process vessel face. The process gasket is exposed to the process fluid through an opening in the process vessel face. A process variable sensor is carried by the process gasket and configured to sense a process variable of the process fluid and provide a sensor output. Measurement circuitry coupled to the process variable sensor provides a process variable transmitter output related to the process variable output. | 09-24-2015 |
20150268075 | MAGNETIC CORE CONFIGURATION FOR MAGNETIC FLOWMETERS - A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid. A magnetic core is mounted relative to the flowtube and includes a plurality of layers of a magnetically permeable material. Each layer is substantially planar and is electrically insulated from others of the plurality of layers. A coil is disposed to generate a magnetic field having field lines that are substantially orthogonal to the plane of each layer. | 09-24-2015 |
20150185057 | WAFER STYLE INSERTABLE MAGNETIC FLOWMETER - A magnetic flowmeter for measuring flow of a process fluid includes a meter body having an opening formed therein. The meter body is configured to be inserted in-line between process piping which carries the process fluid. A moveable extension is coupled to the meter body and configured to extend into the process piping. A coil of wire is carried by the extension and configured to generate a magnetic field. A pair of electrodes sense an EMF in the process fluid generated as a function of the applied magnetic field and flow of the process fluid. | 07-02-2015 |
20150177356 | ANALOG PROCESS VARIABLE TRANSMITTER WITH ELECTRONIC CALIBRATION - A process variable transmitter for measuring a process variable includes a process variable sensor configured to sense a process variable and provide a sensor output. Measurement circuitry receives the sensor output and provides a measured output related to the process variable. Output circuitry provides a device output on a two-wire process control loop based upon the measured output. The output circuitry has a transfer function that is a function of an adjustable analog circuit component. A motorized actuator is configured to adjust the adjustable analog circuit component to thereby change the transfer function of the output circuitry. An optional calibration controller is also provided. | 06-25-2015 |
20150177035 | MAGNETIC FLOWMETER WITH AUTOMATIC OPERATING SETPOINT SELECTION - A magnetic flowmeter includes a flowtube with electrodes and field coil and a transmitter that automatically determines an operating setpoint for the magnetic flowmeter based upon sensed coil inductance, sensed coil resistance, a power rating for the transmitter, the flowtube, or both, and selected performance criteria. | 06-25-2015 |
20150094988 | NON-INTRUSIVE SENSOR SYSTEM - A non-intrusive sensor system includes an array of sensors disposed in a process to measure various input process phenomena and a logic unit that analyses the sensor measurements using an empirical model to produce an estimate of a further process phenomenon not measured directly by any of the array of sensors. The sensors within the array of sensors may be non-intrusive sensors that measure input process phenomena in an intrusive or non-intrusive manner but are non-intrusive with respect to the output process phenomenon as none of these sensors comes into direct contact with the process fluid or process element exhibiting the output process phenomenon. The sensors within the array of sensors can be any type of sensors that produce a measurement of a particular process phenomenon at the same or at different locations within a process. | 04-02-2015 |
20150088279 | NORMALIZED PROCESS DYNAMICS - A sensing system includes a filter construction module that constructs a high pass filter for filtering sensor values indicative of a process variable, the filter construction module setting values for parameters of the filter based on a temperature value indicative of a temperature of the sensor that produced the sensor values. | 03-26-2015 |
20150088277 | PROCESS VARIABLE TRANSMITTER WITH DUAL COMPARTMENT HOUSING - A process variable transmitter for use in an industrial control or monitoring process is provided and includes a housing with a cavity formed therein. The housing includes an integrated terminal block which defines first and second compartments in the cavity. The transmitter further includes a process variable sensor configured to sense a process variable of the industrial process. Measurement circuitry is carried in the first compartment and configured to receive a process variable signal from the process variable sensor and provide an output. An electrical connection is carried on the integrated terminal block in the second compartment and is electrically coupled to the output of the measurement circuitry. | 03-26-2015 |
20150085897 | INFRARED SENSOR - An infrared sensor includes a thermopile connected in series with an ambient temperature compensation resistance temperature detector (RTD) and four electrical leads. The thermopile produces a voltage as a function of temperature of a point of interest, while the RTD varies in resistance as a function of ambient temperature. Two of the leads deliver current to energize the RTD. The other two leads are used for sensing voltages produced by the thermopile and the RTD. | 03-26-2015 |
20150083942 | OPTICAL ISOLATOR WITH PRINTED CIRCUIT BOARD ISOLATION - An optical isolator is provided. The optical isolator includes a printed circuit board having a first surface and a second surface opposite the first surface. The printed circuit board has a recess extending only partially through the board. The first photoelement has an active surface and is mounted relative to the first surface of the printed circuit board. A second photoelement has an active surface and is mounted relative to the second surface. The second photoelement is configured to interact with the first photoelement. At least one of the first and second photoelements has its active surface disposed at least partially in the recess. A portion of the printed circuit board is interposed between the first and second photoelements. | 03-26-2015 |
20150083245 | PRESSURE ISOLATION MANIFOLD - An isolation manifold includes a manifold body, a process connection at a first end of the manifold body, a pressure transmitter connection at a second end of the manifold body, a passageway through the manifold body, an isolation valve, and a pressure limiting device. The process connection is for fluidly connecting the isolation manifold to a process vessel or conduit containing a process fluid. The pressure transmitter connection is for fluidly connecting the isolation manifold to a pressure transmitter. The passageway fluidly connects the process connection to the pressure transmitter connection. The isolation valve is operable to selectively block the passageway to isolate the process connection from the pressure transmitter connection. The pressure limiting device fluidly connects to the passageway between the isolation valve and the pressure transmitter connection. The manifold may preferably include a pressure snubber within the passageway to increase the flow impedance of the passageway. | 03-26-2015 |
20150082909 | MAGNETIC FLOWMETER WITH DRIVE SIGNAL DIAGNOSTICS - A magnetic flowmeter includes a flowtube arranged to receive a flow of process fluid. A coil is positioned proximate the flowtube and arranged to apply a magnetic field to the process fluid in response to a drive current alternating direction. First and second electrodes are arranged to sense a voltage potential in the process fluid in response to the applied magnetic field. The voltage potential is indicative of flow rate of process fluid through the flowtube. A sensor is coupled to the first and second current paths which has a sensor output related to the drive current. Diagnostic circuitry provides a diagnostic output as a function of a transient change in the sensor output when current flowing through the coil alternates direction. | 03-26-2015 |
20150082908 | MAGNETIC CORE CONFIGURATION FOR MAGNETIC FLOWMETERS - A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid therethrough. A magnetic core is mounted relative to the flowtube and includes a stem extending from the flowtube to a pair of arms. Each of the arms extends away from the stem. A spool having a plurality of magnetic windings is disposed about the stem and spaces the plurality of windings from the flowtube. | 03-26-2015 |
20150082907 | INDUSTRIAL PROCESS FIELD DEVICE WITH LOW POWER OPTICAL ISOLATOR - An industrial process control field device includes a process variable transducer configured to sense or control a process variable. Field device circuitry is configured to couple to the process variable transducer and communicate information related to the process variable to another location. The field device circuitry includes an optical isolator having transmit circuitry on a first side of a galvanic isolation configured to transmit an optical signal which is pulsed on and off across the isolation. Receive circuitry is located on a second side of galvanic isolation and configured to receive the optical signal with an optical sensor. The optical sensor enters an “on” state when it receives a pulse and is otherwise in an “off” state. The receive circuitry provides a secondary side output based upon the received optical signal. The receive circuitry enters in a low power state when the optical sensor is in the “off” state. | 03-26-2015 |
20150082906 | MAGNETIC FLOWMETER WITH POWER LIMIT AND OVER-CURRENT DETECTION - A magnetic flowmeter includes circuitry for sensing coil current, coil voltage, or coil resistance. Based on the sensed coil current, voltage, or resistance, a digital processor determines whether a power limit or a coil current limit is exceeded and either halts operation until it receives a new configuration with a new coil current setpoint, or determines a new coil current setpoint itself and adjusts the magnetic flowmeter to that new coil current setpoint. | 03-26-2015 |
20150082905 | MAGNETIC FLOWMETER WITH SATURATION DETECTION AND/OR PREVENTION - A magnetic flowmeter for measuring flow of a process fluid in a pipe includes a magnetic coil disposed adjacent to the pipe configured to apply a magnetic field to the process fluid. First and second electrodes are disposed within the pipe and electrically coupled to the process fluid and configured to sense an electromotive force (EMF) induced in the process fluid due to the applied magnetic field and flow of the process fluid. Input circuitry is coupled to the first and second electrodes and provides an output related to the sensed EMF. Diagnostic circuitry coupled to the input circuitry is configured to identify a saturation related condition and responsively provide a diagnostic output. In another embodiment, saturation prevention circuitry prevents saturation of the input circuitry. | 03-26-2015 |
20150082904 | INDUSTRIAL PROCESS VARIABLE TRANSMITTER WITH ISOLATED POWER SCAVENGING INTRINSICALLY SAFE PULSE OUTPUT CIRCUITRY - An industrial process variable transmitter includes a process variable sensor configured to sense a process variable. Measurement circuitry is coupled to the process variable sensor and provides a measured output as a function of the process variable. Output circuitry includes a loop connection configured to couple to a process control loop. An optical sensor receives the measured output from the measurement circuitry. A switching device applies pulses to the process control loop in response to an output from the optical sensor. Power supply circuitry powers the optical sensor, a comparator, and/or the switching device with power received from the process control loop and loop connection. | 03-26-2015 |
20150082893 | PROCESS FLUID PRESSURE SENSING ASSEMBLY FOR PRESSURE TRANSMITTERS SUBJECTED TO HIGH WORKING PRESSURE - A pressure measurement assembly is provided. The assembly includes a pressure sensor mount having an aperture therethrough. A pressure sensor passes through and is mounted to the aperture. The pressure sensor has an electrical characteristic that varies with applied pressure. An isolator plug is configured to be exposed to a process fluid. The isolator plug has an isolation diaphragm disposed to contact the process fluid. A passageway is fluidically coupled to the isolation diaphragm to convey process fluid pressure from the isolation diaphragm to the pressure sensor through an incompressible fluid. The pressure sensor mount is coupled to the isolator plug and has a non-circular shape when viewed along an axis of the aperture. | 03-26-2015 |
20150082892 | ISOLATOR SYSTEM FOR A PRESSURE TRANSMITTER - An isolator system for a pressure transmitter includes a port internal to the transmitter, a sensor tube, and a fill tube. The sensor tube is connected to the port to fluidly connect a passageway through a transmitter body to a pressure sensor. The sensor tube includes a first end disposed in the port. The first end has a first cross-sectional area. The fill tube is internal to the transmitter and connected to the port to fluidly connect to the passageway. The fill tube includes a second end disposed in the port. The second end of the fill tube has a second cross-sectional area that is less than the first cross-sectional area of the sensor tube. | 03-26-2015 |
20150020607 | MAGNETIC FLOWMETER - A magnetic flowmeter for measuring flow rate of a process fluid includes: a magnetic coil arranged to apply a magnetic field to the process fluid. A pair of electrodes electrically couple to the process fluid and are arranged to sense a voltage induced in the process fluid related to the applied magnetic field and the flow rate of the process fluid. A flow tube of a non-conductive material is arranged to receive a flow of the process fluid therethrough. The flow tube carries the magnetic coil and the pair of electrodes. Flow meter circuitry applies a current to the magnetic coil and receives the voltage sensed by the pair of electrodes. A magnetic field spreader is positioned proximate the magnetic coil and is arranged to spread the magnetic field emanating from the magnetic coil and direct the magnetic field into the flow tube. An exterior wrapper extends around the assembly and completes a magnetic circuit. | 01-22-2015 |
20150020600 | PRESSURE TRANSMITTER HAVING AN ISOLATION ASSEMBLY WITH A TWO-PIECE ISOLATOR PLUG - A pressure transmitter connectable to a process line provides an output responsive to a pressure in the process line. The transmitter includes a housing having a base with a process end coupled to an interior cavity formed in the housing, a sensor for sensing the pressure and an isolating assembly mounted at the process end of the housing and isolating fluid in the process line from the interior cavity. The isolating assembly includes an isolation diaphragm configured to be fluidically coupled to the process pressure in the process line, and an isolator plug positioned in the process of the housing adapter. The isolator plug having a lower plug portion providing a first end surface adjacent the isolation diaphragm, an upper plug portion providing a second end surface distally spaced from the first end surface and adjacent a sensor cavity in which the sensor is positioned, a connection mechanism connecting the lower and upper plug portions, and a capillary filled with isolation fluid and extending from the first end surface through the lower and upper plug portions to the second end surface thereby coupling the pressure through the isolation diaphragm and the capillary to the sensor cavity and the sensor. The upper plug portion is formed from a first material and the lower plug portion is formed from a second material having higher corrosion resistance than the first material. | 01-22-2015 |
20140352749 | INTEGRAL THERMOELECTRIC GENERATOR FOR WIRELESS DEVICES - Electrical power is produced by a first process component, a first heat pipe formed in part by a first cavity within the first process component, and a thermoelectric generator assembly. The thermoelectric generator assembly is thermally coupled on one side to a heat sink and on the other side to the first heat pipe. The first process component is in direct contact with a first process fluid and the first cavity is proximate the first process fluid. The thermoelectric generator assembly produces electrical power. | 12-04-2014 |
20140351588 | METHOD AND SYSTEM FOR PRODUCT AUTHENTICATION - During manufacturing a unique encrypted authentication code is created for each product based upon device specific information relating to that product. The unique encrypted authentication code together with the device specific information is stored in a database, and a representation of the unique encrypted authentication code is stored on the product. To determine whether a product in question is authentic, the readable representation of the unique encrypted authentication code is read and sent to a server along with a request for product authentication. The server provides an indication of authenticity of the product in question based upon the unique encrypted authentication code received and the device specific information associated with that unique encrypted authentication code in the database. | 11-27-2014 |
20140320154 | FIELD DEVICE WITH SELF-TESTING OF A PIEZOELECTRIC TRANSDUCER - An industrial process field device having a piezoelectric transducer performs self-testing of the condition of the piezoelectric transducer during a self-test mode. A charging current is supplied to the piezoelectric transducer, and voltage on the piezoelectric transducer as a result of the charging current is monitored. A diagnostic test result indicating condition of the piezoelectric transducer is produced based on the magnitude of the voltage. | 10-30-2014 |
20140274181 | RESOURCE OPTIMIZATION IN A FIELD DEVICE - A field device assembly comprises a first process sensor, a wireless transceiver, and a processor. The first process sensor is disposed to sense a first process parameter. The wireless transceiver is configured to communicate wirelessly with a network manager. The processor is configured to process the sensed first process parameter, and to command the wireless transceiver and first process sensor to perform a first resource-intensive activity according to a first commissioned adaptive schedule whereby rates of the resource-intensive activity vary over time and/or based on sensed events. | 09-18-2014 |
20140273895 | WIRELESS INTERFACE WITHIN TRANSMITTER - A process transmitter is configured to measure a process variable of an industrial process. The process transmitter includes a process variable sensor which senses the process variable and responsively provides a process variable sensor output. Sensor circuitry is coupled to the process variable sensor. A housing to encloses the sensor circuitry and the output circuitry. The sensor circuitry electrical couples to the housing. The sensor circuitry wirelessly communicates with the output circuitry. | 09-18-2014 |
20140269829 | TEMPERATURE TRANSMITTER TRANSIENT PROTECTOR - A process sensor assembly comprises a hollow protective housing, a temperature sensor, a process transmitter, and a transient protector. The temperature sensor includes a probe extending out of the hollow protective housing to a sensing location, and a top plate movably secured to the hollow protective housing so as to allow travel within the hollow protective housing with vibrations of the probe. The process transmitter is configured to process and transmit sensor signals from the temperature sensor, and is retained on the top plate to move with the temperature sensor within the hollow protective housing. The transient protector is configured to condition power for to the process transmitter, and is anchored to the process transmitter so as to move with the process transmitter within the hollow protective housing. | 09-18-2014 |
20140269828 | VIBRATION DETECTION IN THERMOWELLS - A sensor system comprises a process transducer, a unpowered vibration sensor, and a process transmitter. The process transducer is disposed within a thermowell and configured to produce a first sensor signal. The unpowered vibration sensor is configured to produce a second sensor signal reflecting vibration of the thermowell. The process transmitter is configured to receive, process, and transmit the first and second sensor signals. | 09-18-2014 |
20140269820 | THERMOWELL INSERT - A temperature sensing system comprises a thermowell, a sensor, and a solid insert. The thermowell extends into a sensing region of a fluid flow. The sensor has a probe housed in the thermowell to sense a temperature in the sensing region. The solid insert is configured to removably support the probe within the thermowell and to provide a thermal contact between the thermowell and the probe. | 09-18-2014 |
20140269764 | COMMUNICATIONS UNIT FOR AN INDUSTRIAL PROCESS NETWORK - A field device is configured to send and receive data over an industrial process network. The field device includes a processor and a communications unit communicatively connected to the industrial process network. The communications unit is configured to send and receive the data over the industrial process network via a first communications protocol at a first data rate. The communications unit is connected to communicate with the processor via a second communications protocol at a second data rate that is greater than the first data rate. | 09-18-2014 |
20140269334 | CHANNEL GREY LISTING - A wireless communication system grey-lists those channels that interfere with channels used by a second wireless communication system. The wireless communication system reduces the rate at which the grey-listed channels are utilized in the channel-hopping pattern, but does not completely eliminate use of the grey-listed channels. | 09-18-2014 |
20140266259 | PROCESS MEASUREMENT SYSTEM WITH VARIABLE AMPLITUDE SENSOR EXCITATION - A process measurement system includes a sensor for producing a sensor signal as a function of a process parameter and a measurement circuit that converts the sensor signal to measurement data. A control circuit controls the amplitude of the sensor excitation to maximize signal strength over the entire operating ratio range of the sensor. This enhances resolution and noise rejection of the measurement circuit. | 09-18-2014 |
20140265306 | SEPARATELY REPLACEABLE SEAL SYSTEMS FOR USE WITH A PRESSURE TRANSMITTER - A replaceable seal system with high and low sides connectable to a coplanar inlet plate on a pressure transmitter. A first side of the seal system can be replaced without disturbing the sealing of a second side of the seal system. The seal system includes a stack of first and second plates with a central split line. At least one of the first and second plates is split along the central split line to provide for separate replacement on only one side of the system. | 09-18-2014 |
20140260666 | FLANGED REDUCER VORTEX FLOWMETER - A flanged vortex flowmeter is connected to a flanged piping system that has a diameter larger than the diameter of the measurement section of the vortex flowmeter border. The vortex flowmeter has an inlet flange that reduces diameter from the inlet to the measurement section. A bluff body positioned in the measurement section produces vortices that alternate at a frequency proportional to the flow rate of fluid through the flowmeter. A length from inception of vortex shedding at the bluff body to a first expansion of the flow passage downstream of the bluff body is greater than a vortex wavelength of the vortices produced by the bluff body. | 09-18-2014 |
20140260662 | MAGNETIC FLOWMETER WITH AUTOMATIC ADJUSTMENT BASED ON SENSED COMPLEX IMPEDANCE - A magnetic flowmeter comprises a pipe section for process flow, a coil for generating a magnetic field across the pipe section, a current source for energizing the coil to generate the magnetic field at a coil drive frequency, and electrodes for sensing voltage induced across the process flow by the magnetic field. A processor calculates a function of the sensed voltage and generates a flow output based on the function. The processor adjusts an operating parameter of the flowmeter, such as electrode voltage sampling period, the coil drive frequency, or a phase shift, as a function of a sensed electrode-to-electrode or electrode-to-ground complex impedance. | 09-18-2014 |
20140260661 | MAGNETIC FLOWMETER WITH BONDED PTFE ELECTRODES - A magnetic flowmeter includes a pipe with a non-conductive PTFE liner, magnetic coils to generate a magnetic field, and electrodes in contact with the fluid on opposite sides of the pipe. The electrodes comprise conductive PTFE patch electrodes bonded to the non-conductive PTFE liner so that an inner end of each patch electrode is exposed to fluid flowing through the interior pipe and an outer end of each patch electrode is aligned with an electrode hole in the pipe. | 09-18-2014 |
20140260658 | FLOWMETER PRIMARY ELEMENT WITH SENSORS - A process variable transmitter is configured as a flowmeter for measuring flow of a process fluid through a conduit. The transmitter includes a pitot tube extending into the conduit which creates a differential pressure in the process fluid due to flow of the process fluid. An upstream process variable sensor is mounted on the pitot tube and coupled to the flow of process fluid to sense an upstream process variable of the process fluid. A downstream process variable sensor is mounted on the pitot tube downstream of the upstream process variable sensor and coupled to the flow of process fluid to sense a downstream process variable of the process fluid. Measurement circuitry determines the flow of the process fluid based upon the upstream process variable and the downstream process variable. | 09-18-2014 |
20140254717 | DIGITALLY COMPENSATED PROCESS TRANSMITTER WITH MINIMAL DEAD TIME - A processor transmitter includes a sensor, a first signal path, a second signal path, and an output summing circuit. The sensor produces a process signal that is a function of a process parameter. The first signal path digitally compensates the process signal. The second signal path digitally filters the process signal and subjects the process signal to less delay than the first signal path. The output summing circuit sums the digitally compensated process signal from the first signal path and the digitally filtered process signal from the second signal path to produce a fast digital compensated process signal. | 09-11-2014 |
20140251019 | COPLANAR PROCESS FLUID PRESSURE SENSOR MODULE - A coplanar process fluid pressure sensor module is provided. The module includes a coplanar base and a housing body. The coplanar base has a pair of process fluid pressure inlets, each having an isolator diaphragm. The housing body is coupled to the coplanar base at an interface between the coplanar base and the housing body. A differential pressure sensor is operably coupled to the pair of process fluid pressure inlets, and is disposed proximate the coplanar base within the housing body. | 09-11-2014 |
20140241399 | PROCESS TEMPERATURE TRANSMITTER WITH IMPROVED SENSOR DIAGNOSTICS - A process temperature transmitter is operable with at least one temperature sensor having a plurality of leads. The temperature transmitter includes measurement circuitry operably coupleable to the at least one temperature sensor to provide an indication of an electrical parameter of the at least one temperature sensor. A controller is coupled to the measurement circuitry to obtain the indication and provide a process temperature output. A current source applies a test current to the plurality of leads simultaneously. Diagnostic circuitry measures a voltage response on each lead in order to provide a diagnostic indication of the temperature sensor. | 08-28-2014 |
20140239151 | SELF-POWERED OPTICAL DETECTOR FOR MECHANICAL GAUGE INSTRUMENTS - An embodiment of the present invention includes a display device including a mechanical indicator, a reference photodetector, a measurement photodetector, and an opaque shroud. The opaque shroud is connected to the mechanical indicator to variably cover the measurement photodetector based on a position of the mechanical indicator. The opaque shroud does not cover the reference photodetector. | 08-28-2014 |
20140238126 | REDUCED-STRESS COUPLING FOR INDUSTRIAL PROCESS TRANSMITTER HOUSING - An industrial process transmitter comprises a sensor module, a housing and a compression ring. A process sensor is located in the sensor module. The housing comprises an electronics compartment having an internal space in which transmitter electronics are located, and a sensor compartment having opening into which the sensor module is inserted. The compression ring is attached to the sensor module or the housing and is configured to arrest rotation of the housing with respect to the sensor module. | 08-28-2014 |
20140112368 | ONLINE CALIBRATION OF A TEMPERATURE MEASUREMENT POINT - A method for calibrating a transmitter with measurement circuitry electrically connected to first and second input terminals includes connecting a primary temperature sensor to the first input terminal and connecting a calibrated reference device to the second input terminal. The measurement circuitry is calibrated with respect to the first input terminal according to signals received from the second input terminal while measuring temperature according to signals received from the first input terminal. | 04-24-2014 |
20140090837 | DETECTION OF POSITION OF A PLUNGER IN A WELL - A system for identifying location of a plunger that moves along a length of a well, includes an acoustic source carried in the well configured to transmit an acoustic signal when the plunger reaches a sense location in the well. An acoustic receiver is positioned at a top of the well and is configured to receive the acoustic signal processing circuitry processes the received acoustic signal and provides an output indicative of the plunger reaching the sense location. | 04-03-2014 |
20140090483 | MAGNETIC FLOWMETER - A magnetic flowmeter for sensing process fluid flow is provided. The flowmeter includes a tube configured to receive the process fluid flow therethrough. A plurality of electrodes is disposed to contact process fluid. At least one electromagnetic coil is disposed proximate the tube. Flowmeter electronics are configured to drive a current through at least one electromagnetic coil and to sense a signal developed across a plurality of electrodes disposed to contact process fluid. A flexible circuit module is disposed proximate the tube, and has at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics. The at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces. | 04-03-2014 |
20140090478 | HIGH PRESSURE FLUID COUPLING - A process fluid pressure sensing system includes a process fluid pressure transmitter and a process manifold. The process fluid pressure transmitter has first and second pressure inlets and is configured to obtain a measurement relative to pressures applied at the first and second pressure inlets and provide a process variable output based on the measurement. The process manifold is operably coupled to a process fluid and has first and second pressure outlets. A first high-pressure coupling joins the first pressure outlet of the process manifold to the first pressure inlet of the process fluid pressure transmitter. A second high-pressure coupling joins the second pressure outlet of the process manifold to the second pressure inlet of the process fluid pressure transmitter. The first and second high-pressure fluid couplings are configured to accommodate misalignment between the respective pressure outlets and inlets. | 04-03-2014 |
20140088918 | FLAME INSTABILITY MONITORING WITH DRAFT PRESSURE AND PROCESS VARIABLE - A furnace is monitored by monitoring a statistical variable calculated from a draft measurement and monitoring a process variable related to the operation of the furnace. An abnormal operation of the furnace is determined based upon the statistical variable and the process variable. | 03-27-2014 |
20140088905 | PROCESS VARIABLE TRANSMITTER WITH EMF DETECTION AND CORRECTION - A preexisting voltage across a sensor is latched to a storage capacitor prior to any excitation current being applied to the sensor. Once the excitation current is applied, the voltage on the storage capacitor is directly subtracted from a differential voltage across the sensor. The subtraction is done before a measurement is converted to a digital value and passed to a transmitter. The subtraction is performed in hardware, and a time required to sample and hold the preexisting voltage across the storage capacitor is within a settling time used for collecting any sensor measurements. | 03-27-2014 |
20140088893 | HYBRID POWER MODULE WITH FAULT DETECTION - A wireless field device assembly comprises a process sensor, a housing, a power module, and a processor. The process sensor is configured to monitor a process variable and produce a sensor signal. The housing encloses an interior space of the wireless field device. The power module comprises an energy storage device and a connection to a local power source, and is configured to be housed in the wireless field device. The processor is located within the interior space, and is powered by the power module. The processor produces a fault signal value used to differentiate between energy storage device faults, local power source faults, and no-fault states. | 03-27-2014 |
20140087599 | FIELD DEVICE WITH IMPROVED TERMINATIONS - A field device is provided. The field device includes field device electronics configured to couple to a transducer. A plurality of terminals is coupled to the field device electronics and is configured to couple the field device to a process communication loop to allow the field device to communicate over the process communication loop. Each of the plurality of terminals is configured to support multiple conductor attachment types. | 03-27-2014 |
20140086286 | DIVERSITY ANTENNA HOUSING - A wireless device comprises a plurality of diverse antennas, an accelerometer configured to determine an orientation of the wireless device, and a processor. The processor is configured to initially select a primary link configuration based on the determined orientation of the wireless device. The primary link configuration designates one or more of the plurality of diverse antennas and one or more diverse antennas of another wireless device configured to transmit the payload messages. The processor is further configured to receive payload messages using the primary link configuration, record a received signal strength indication (RSSI) value for the received payload messages, and periodically test RSSI for alternative link configurations. The processor compares RSSI between the primary link configuration and the alternative link configuration, and revises the primary link configuration if the comparison indicates that the alternative link configuration RSSI is greater than primary link configuration RSSI. | 03-27-2014 |
20140083200 | INTEGRALLY MOLDED MAGNETIC FLOWMETER - A magnetic flowmeter for measuring flow rate of a process fluid, includes a magnetic coil arranged to apply a magnetic field to the process fluid. A pair of electrodes are electronically coupled to the process fluid and arranged to sense a voltage induced in the process fluid related to the applied magnetic field and the flow rate of the process fluid. A molded flow tube of a non-conductive material is arranged to receive a flow of the process fluid. The flow tube is molded around the magnetic coil and the pair of electrodes and is configured to support the magnetic coil and the pair of electrodes. Flow meter circuitry is configured to apply a current to the magnetic coil and receive the resultant voltage sensed by the pair of electrodes. | 03-27-2014 |
20140083199 | MAGNETIC FLOWMETER WITH MULTIPLE COILS - A magnetic flowmeter for measuring a flow of a process fluid includes a flowtube arranged to receive the flow of the process fluid. First, second and third coils are arranged adjacent the flowtube. First and second electrodes are arranged to sense an electrical potential of the process fluid related to an applied magnetic field and a flow rate of the process fluid. The sensed electrical potential is used to calculate the flow rate of the process fluid through the flow tube. | 03-27-2014 |
20140083171 | PRESSURE TRANSMITTER WITH FILL TUBE - A pressure transmitter has a pressure sensor, an isolator diaphragm, and a fill tube. Interior passages in the pressure sensor module body are filled with isolator fluid and provide fluid connections. The isolator fluid couples pressure from the first isolator diaphragm assembly to the pressure sensor. A first crimp portion of the fill tube radially narrows into a substantially solid circular cylindrical cross section to form a first primary seal that is resistant to high pressure cycling. | 03-27-2014 |
20140005957 | VISCOMETER FOR NEWTONIAN AND NON-NEWTONIAN FLUIDS | 01-02-2014 |
20140003465 | INDUSTRIAL PROCESS TEMPERATURE TRANSMITTER WITH SENSOR STRESS DIAGNOSTICS | 01-02-2014 |
20130344818 | MODULAR TERMINAL ASSEMBLY FOR WIRELESS TRANSMITTERS - A terminal module is configured to fit inside an internal power source receptacle in a housing of a process field device, and comprises a wired power source connection, power conditioning electronics, and a field device connection. The wired power source connection is configured to receive power from an external source. The power conditioning electronics are capable of conditioning power from the wired power source connection for reception by the industrial field device. The field device connection is configured to provide power conditioned by the power conditioning electronics to the process field device via a terminal configured to receive and mate with the internal power source. | 12-26-2013 |
20130329159 | DUAL COMPARTMENT ENVIRONMENTAL SEAL - An environmental seal between two compartments, such as in a process transmitter, linked by a passageway contains an electrical cable. The seal includes a stop, a cable gland body, a compression bushing, a cable gland nut, and a first elastomeric seal. The stop projects from an interior surface of the passageway. The cable gland body is in contact with the stop and encircles a portion of the electrical cable. The compression bushing is within the cable gland body and encircles the portion of the electrical cable. The cable gland nut compresses the compression bushing and seals the compression bushing against the electrical cable and against an interior surface of the cable gland body. The first elastomeric seal seals between an exterior surface of the cable gland body and the interior surface of the passageway. | 12-12-2013 |
20130325381 | PROCESS CONTROL LOOP CURRENT VERIFICATION - Some embodiments are directed to a process device comprising a process variable sensor configured to generate an output signal indicative of a sensed process variable; loop current output circuitry configured to control a loop current on a two wire process control loop to a value based on the output signal; loop current measurement circuitry coupled to the process control loop and configured to generate a measured loop current value based on the loop current; and loop current verification circuitry configured to approximate the loop current value based on the output signal and properties of a low pass filter, and generate a diagnostic signal based on a comparison of the approximated loop current value and the measured loop current value. | 12-05-2013 |
20130305838 | FASTENING SYSTEM FOR MAGNETIC FLOWMETER LINER - A magnetic flowmeter sensor includes two sensor faces, a conduit, a liner lining the conduit, and mechanical fasteners. The sensor faces are on each end of the sensor for connecting the sensor to the process fluid flow. The conduit connects the two sensor faces for conducting the process fluid flow through the sensor. The liner extends across at least a portion of each sensor face at each end of the flowmeter sensor to form a planar sealing surface on each end of the sensor. The liner includes holes through which the mechanical fasteners pass to mechanically attach the liner to the flowmeter sensor to prevent shifting of the liner. The mechanical fasteners do not extend beyond the planar sealing surfaces. | 11-21-2013 |
20130283928 | VIBRATION DAMPER FOR SENSOR HOUSING - A sensor probe comprises a tube, a sensor element and an absorber mass. The tube is for placement in a process fluid flow within a fluid conduit and comprises a first end for coupling to the fluid conduit and a second end for insertion into the process fluid flow. The sensor element is in communication with the tube. The absorber mass is coupled to the tube and is configured to dampen vibration of the tube when inserted in the process fluid flow. | 10-31-2013 |
20130282145 | PROCESS VARIABLE COMPENSATION IN A PROCESS TRANSMITTER - A process variable transmitter includes a process variable sensor having a process variable sensor output related to a sensed process variable. Analog compensation circuitry is configured to receive the process variable sensor output and responsively provide a compensated process variable sensor output based upon a compensation function which is responsive to a control input. Output circuitry provides an output based upon the compensated process variable. Digital control circuitry is coupled to the analog compensation circuitry providing a control output which is applied to the control input of the analog compensation circuitry to thereby control the compensation function. | 10-24-2013 |
20130191556 | PLUG-AND-PLAY SENSOR PERIPHERAL COMPONENT FOR PROCESS INSTRUMENTATION - A plug-and-play sensor peripheral component includes an electrically conductive physical connector; an electrical connector; a transformer; and an RF communication and data storage circuit. The electrical connector is electrically connected to the physical connector by a first conductive path. The transformer is electrically connected to the RF communication and data storage circuit. The transformer and the RF communication and data storage circuit are electrically isolated from the physical connector and the electrical connector. Electrically connecting the physical connector to the electrical connector by other than the first conductive path inductively couples the RF communication and data storage circuit to the first conductive path. | 07-25-2013 |
20130182741 | ONLINE CALIBRATION OF A TEMPERATURE MEASUREMENT POINT - A method for calibrating a transmitter with measurement circuitry electrically connected to first and second input terminals includes connecting a primary temperature sensor to the first input terminal and connecting a calibrated reference device to the second input terminal. The measurement circuitry is calibrated with respect to the first input terminal according to signals received from the second input terminal while measuring temperature according to signals received from the first input terminal. | 07-18-2013 |
20130162040 | DYNAMIC POWER CONTROL FOR A TWO WIRE PROCESS INSTRUMENT - A process instrument includes a transducer, a two wire interface, a microprocessor, a digital to analog converter, a first control circuit, and a second control circuit. A current passing through the two wire interface indicates a condition of the transducer. The microprocessor is interfaced with the transducer. The digital to analog converter receives a signal from the microprocessor indicating a current value. The first control circuit is coupled to the digital to analog converter and adapted to control the current passing through the two wire interface to the current value. The second control circuit is coupled to the digital to analog converter and supplies current to a secondary load. | 06-27-2013 |
20130160560 | PRESSURE SENSOR MODULE FOR SUB-SEA APPLICATIONS - A co-planar differential pressure sensor module is provided. The module includes a base having a pair of recesses. A pair of pedestals is also provided where each pedestal is disposed in a respective recess and is coupled to a respective isolation diaphragm. A differential pressure sensor has a sensing diaphragm and a pair of pressure sensing ports. Each port of the differential pressure sensor is fluidically coupled to a respective isolation diaphragm by a fill fluid. The module also includes circuitry coupled to the differential pressure sensor to measure an electrical characteristic of the sensor that varies with differential pressure. The base is constructed from a material that is suitable for submersion in seawater. A method of constructing a co-planar differential pressure sensor module is also provided. In another embodiment, a pressure sensor module is provided. The pressure sensor module includes a base having a recess. A pedestal is disposed in the recess and is coupled to an isolation diaphragm. A pressure sensor having a sensing diaphragm and a pressure sensing port is fluidically coupled to the isolation diaphragm by a fill fluid. Circuitry is coupled to the pressure sensor to measure an electrical characteristic of the sensor that varies with pressure. The base is constructed from a material that is suitable for submersion in seawater. | 06-27-2013 |
20130154862 | DYNAMICALLY ADJUSTED A/D RESOLUTION - A process variable transmitter is used to measure a process variable, and, in doing so, dynamically changes the resolution of the A/D converter based upon the measured value of the analog input signal. This can be done by automatically adjusting the configurable resolution gain adjustment based on the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution window of the A/D converter, or by adjusting a voltage reference provided to the A/D converter. | 06-20-2013 |
20130142216 | TWISTED SENSOR TUBE - A sensor tube for protecting a sensor inserted into a moving process fluid is provided. The sensor tube includes a process interface section for mounting to a process vessel and an extended section extending from the process interface section to a sealed end. The extended section includes a twisted section having a longitudinal axis. The process interface section and the extended section define a sensor bore configured to receive a sensor therein. The twisted section has a cross section that includes at least three equally sized walls and wherein the walls form helixes along the longitudinal axis of the twisted section. | 06-06-2013 |
20130141286 | WIRELESS FIELD DEVICE WITH RUGGED ANTENNA AND ROTATION STOP - A field device includes a housing having at least an antenna receiving bore. Field device electronics are disposed within the housing and include wireless communication circuitry configured to communicate wireless process information. An antenna assembly includes an antenna base engaged within the antenna receiving bore of the housing. The antenna assembly including an antenna operably coupled to the wireless communication circuitry. The antenna assembly is rotatable within the bore by an amount less than one full rotation, and rotation of the antenna assembly varies orientation of the antenna. | 06-06-2013 |
20130139565 | FERROFLUID MODIFIED FILL FLUID FOR PRESSURE TRANSMITTERS - A pressure transmitter for measuring a pressure of a process fluid comprises a transmitter housing, a pressure sensor, a hydraulic relay system, a ferrofluid and transmitter electronics. The capacitance-based pressure sensor senses the pressure of the process fluid and is disposed within the housing. The hydraulic relay system comprises an isolation diaphragm positioned on an exterior of the transmitter housing, and an isolation tube extending from the pressure sensor to the isolation diaphragm. The ferrofluid is located in the isolation tube to transmit a change in the pressure of the process fluid at the isolation diaphragm to the sensor. The transmitter electronics are positioned within the housing and are configured to receive and condition a pressure signal from the pressure sensor. | 06-06-2013 |
20130136204 | TURBINE METER PRE-SCALING TERMINAL BLOCK ELECTRONICS - An electronic circuit for converting higher-frequency output signals from a sensor into lower-frequency input signals for a discrete input wireless transmitter. The circuit includes a differential amplifier, a digital comparator, a digital frequency divider, and a transistor switch. The differential amplifier amplifies the sensor signals as a function of a frequency of the sensor signals. The digital comparator generates a square wave signal by comparing the amplified sensor signals to a fixed reference voltage. The digital frequency divider generates a lower-frequency signal by dividing the square wave signal. The transistor switch generates the lower-frequency input signals for the discrete input wireless transmitter by switching as a function of the lower-frequency signal from the digital frequency divider. | 05-30-2013 |
20130094500 | PROCESS INSTALLATION NETWORK INTRUSION DETECTION AND PREVENTION - A process communication device includes a process communication interface for communicating on a process communication loop in accordance with a process communication protocol. A controller is coupled to the process communication interface. A rules store is coupled to the controller, and has at least one process communication packet rule that is based on the process communication protocol. The controller applies the at least one process communication packet rule to at least one process communication packet received from the process communication interface, and generates event information when a process communication packet fails at least one process communication packet rule. | 04-18-2013 |
20130074604 | PROCESS FLUID PRESSURE TRANSMITTER WITH SEPARATED SENSOR AND SENSOR ELECTRONICS - A process fluid pressure transmitter has a remote pressure sensor. The transmitter includes an electronics housing and a loop communicator disposed in the electronics housing and being configured to communicate in accordance with a process communication protocol. A controller is disposed within the electronics housing and is coupled to the loop communicator. Sensor measurement circuitry is disposed within the electronics housing and is coupled to the controller. A remote pressure sensor housing is configured to couple directly to a process and is spaced from the electronics housing. A pressure sensor is disposed within the remote pressure sensor housing. The pressure sensor forms at least one electrical component having an electrical characteristic that varies with process fluid pressure. Portions of the electrical component are coupled directly to a multiconductor cable that operably connects the pressure sensor to the sensor measurement circuitry. | 03-28-2013 |
20130006544 | Variable frequency magnetic flowmeter - An apparatus comprises a pipe section for process flow, a coil for generating a magnetic field across the pipe section, a current source for energizing the coil to generate the magnetic field, and an electrode for sensing an electromotive force induced across the process flow by the magnetic field. The current source energizes the coil at a plurality of different pulse frequencies. A processor calculates a function of the electromotive force at the plurality of different pulse frequencies, and generates a flow output based on the function. | 01-03-2013 |
20130005372 | Integral thermoelectric generator for wireless devices - Electrical power is produced by a first process component, a first heat pipe formed in part by a first cavity within the first process component, and a thermoelectric generator assembly. The thermoelectric generator assembly is thermally coupled on one side to a heat sink and on the other side to the first heat pipe. The first process component is in direct contact with a first process fluid and the first cavity is proximate the first process fluid. The thermoelectric generator assembly produces electrical power. | 01-03-2013 |
20120293015 | Process device with light change triggered display - A field device comprises a transducer, a photodetector, a display, and a display controller. The transducer controls or monitors process variable, and the display shows information relating to the process variable. The photodetector detects a light level. The display controller is capable of switching the display on and off in response to changes in the light level detected by the photodetector. | 11-22-2012 |
20120279580 | PROCESS FLUID PRESSURE TRANSMITTER WITH REPLACEABLE ATMOSPHERIC VENT FILTER - A process fluid pressure transmitter for measuring a process pressure referenced to atmospheric pressure is provided. The process fluid pressure transmitter includes a pressure sensor fluidically coupled to a pair of pressure conveying conduits. The pressure sensor has an electrical characteristic that varies with the pressures applied by the pressure conveying conduits. A process fluid inlet is disposed to contact a process fluid, and is in fluidic communication with a first conduit of the pair of pressure conveying conduits. An atmospheric vent is coupled to a second conduit of the pair of pressure conveying conduits. The atmospheric vent is replaceable and has a filter element disposed therein. | 11-08-2012 |
20120237034 | WIRELESS MESH NETWORK WITH SECURE AUTOMATIC KEY LOADS TO WIRELESS DEVICES - A wireless mesh network provides secure communication by encrypting data using one or more encryption keys. A configuration device in communication with a security manager of the network provides a temporary secure communication path between the security manager and a new field device to be added to the mesh network. Cryptographic material and other configuration data can then be transferred between the security manager of the network and the new field device securely via the configuration device. | 09-20-2012 |
20120236033 | SOFTWARE ROTATABLE DISPLAY - An industrial process transmitter includes a transducer positioned to interact with an industrial process, display circuitry that displays a visual output to an operator, and control circuitry. The display can be selectively modified to provide the visual output at one of a plurality of orientations. The control circuitry is connected to communicate with the transducer and the display circuitry and receive an input regarding the orientation of the industrial process transmitter. In response to received input regarding the orientation of the industrial process transmitter, the control circuitry provides instructions to the display circuitry to modify the orientation of the visual output. | 09-20-2012 |
20120093242 | FIELD DEVICE WITH SELF DESCRIPTION - A field device having a self-description is provided. The field device includes loop communication circuitry configured to communicate process information using a process standard communication protocol. A controller is coupled to the loop communication circuitry to communicate with one or more process devices using the loop communication circuitry. The controller is coupled to a non-volatile, writeable, non-transitory computer readable medium having a plurality of blocks. A first block contains device executable code, which when executed by the controller causes the field device to provide at least one process control function. A second block, at least as large as the first block, contains an electronic device description of the field device. | 04-19-2012 |
20120091913 | Dynamic power control for a two wire process instrument - A process instrument includes a transducer, a two wire interface, a microprocessor, a digital to analog converter, a first control circuit, and a second control circuit. A current passing through the two wire interface indicates a condition of the transducer. The microprocessor is interfaced with the transducer. The digital to analog converter receives a signal from the microprocessor indicating a current value. The first control circuit is coupled to the digital to analog converter and adapted to control the current passing through the two wire interface to the current value. The second control circuit is coupled to the digital to analog converter and supplies current to a secondary load. | 04-19-2012 |
20120086461 | DETECTION AND COMPENSATION OF MULTIPLEXER LEAKAGE CURRENT - A multiplexed input/output (I/O) system detects leakage currents on a selected input channel. The system includes a leakage detection multiplexer connected to provide an output selected from one of a plurality of input channels. In addition, the leakage detection multiplexer provides as part of the output measured leakage currents associated with the selected input channel. Based on the detected leakage currents, a determination can made regarding whether the detected leakage currents have compromised the integrity of the multiplexer output. In addition, the detected leakage current can be used to compensate the output provided by the multiplexer to account for the presence of leakage currents on the selected channel. | 04-12-2012 |
20120079884 | Industrial process transmitter with high static pressure isolation diaphragm coupling - A process transmitter for measuring a process variable comprises a sensor module and a static pressure coupling. The sensor module comprises a sensor for measuring a process variable of an industrial process and for generating a sensor signal. The sensor includes a hydraulic fluid inlet within the module. The static pressure coupling is connected to the sensor module and comprises a isolator fitting, a process fluid coupling and an isolation diaphragm. The isolator fitting is inserted into the sensor module and connected to the hydraulic fluid inlet. The process fluid coupling is joined to the isolator fitting. The isolation diaphragm is positioned between the isolator fitting and the process fluid coupling outside of the sensor module. | 04-05-2012 |
20120063101 | Capacitive touch interface assembly - A display assembly includes a transparent cover piece, a display shroud having a contact structure arranged to face the transparent cover piece, an interface subassembly mounted on the display shroud, an electronics board shroud having a support member and a connection feature, and a biasing member operably engaged between the display shroud and the electronics board shroud. The connection feature mechanically connects the electronics board shroud to the display shroud while permitting axial displacement and rotation therebetween. The biasing member rests on the support member of the electronics board shroud, and the biasing member is configured to urge the contact structure of the display shroud into physical contact with the transparent cover piece. The interface subassembly includes a display circuit for providing a digital display and a touch circuit for providing touch actuation at or near the digital display through the transparent cover piece. | 03-15-2012 |
20120063065 | Collar Style cover and housing assembly for field device - A field device assembly includes a housing body, a first circuitry subassembly mounted to the housing body and positioned at least partially within the housing body, a first cover chassis having a shoulder, mating flame path restricting structures positioned on the first cover chassis and the housing body, a first threaded collar configured to fit about the first cover chassis and to permit rotation relative to the first cover chassis, and a second circuitry subassembly secured to the first cover chassis. The first threaded collar is threadably engaged with the housing body, and includes an engagement structure engaged with the shoulder of the first cover chassis to secure the first cover chassis to the housing body. The second circuitry subassembly includes an electrical connector configured for linear insertion engagement with a mating electrical connector within the housing body to electrically connect the first and second circuitry subassemblies. | 03-15-2012 |
20120006120 | TRANSMITTER OUTPUT WITH SCALABLE RANGEABILITY - An industrial process transmitter includes a sensing system and transmitter electronics. The sensing system senses a process variable over a range. The transmitter electronics is connected to the sensing system and produces a scaled analog communication signal to communicate the process variable over an analog loop. The range is disproportionately distributed over the scale by the transmitter electronics. | 01-12-2012 |
20110301867 | Fluid flow measurement with phase-based diagnostics - A system comprises a differential pressure sensor, a process pressure sensor, a temperature sensor and a microprocessor. The differential pressure sensor is positioned to sense differential pressure along a fluid flow, where fluid properties of the fluid flow have first and second phases separated along a transition curve. The process pressure sensor is positioned to sense a pressure of the fluid flow, and the temperature sensor is positioned to sense a temperature of the fluid flow. The microprocessor is coupled to the temperature sensor and the pressure sensor to determine a flow rate, and the microprocessor generates a diagnostic based on the process pressure and the temperature as compared to the transition curve. | 12-08-2011 |
20110219885 | FLOWMETER BODY WITH A GROOVE IN A FLOWMETER OUTLET SURFACE - A flowmeter body ( | 09-15-2011 |
20110216695 | APPARATUS FOR INTERCONNECTING WIRELESS NETWORKS SEPARATED BY A BARRIER - An apparatus for bridging a barrier to wireless communication between wireless field device networks includes a pair of locally-powered wireless devices connected by a wired link spanning the barrier. At least one of the locally-powered wireless devices is in wireless communication with each of the wireless networks intended to be interconnected. The wireless devices include a wireless transceiver and an antenna. Messages from one wireless field device network addressed to a member node of another wireless field device network are received by a wireless device on one side of the barrier and transmitted via the wired link to another wireless device on the other side of the barrier for routing to the member node of the other wireless field device network. | 09-08-2011 |
20110171497 | MODULAR INTRINSICALLY-SAFE FIELD DEVICE POWER MODULE - A modular, intrinsically-safe power module assembly is provided. The assembly includes a rigid conduit adapter configured to mount to a conduit of a field device. A housing, having an interior, is operably coupled to the rigid conduit adapter and is physically supported by the rigid conduit adapter. At least one non-rechargeable battery is disposed within the housing. Intrinsic safety circuitry is coupled to the at least one non-rechargeable battery, and is coupled to a connector that mates with a cooperative connector in the rigid conduit adapter. | 07-14-2011 |
20110110242 | LOCATION DETECTION IN A WIRELESS NETWORK - A first node sends a first message to a second node. The second node sends a second message to the first node. A first elapsed time is measured from the beginning of the transmission of the first message to the beginning of receipt of the second message. A second elapsed time is measured from the beginning of the receipt of the first message to the beginning of the transmission of the second message. The second node sends a third message to the first node containing the second elapsed time. The distance between the first and second node is calculated based on these elapsed times and a calibration count multiplier contained in the second or third message. A node may be moved within a wireless mesh network. Positional information about the node and distances to its neighbors is determined and transmitted to the network manager where it is stored. | 05-12-2011 |
20110079089 | COMPLIANT COIL FORM - A coil assembly includes a coil form and a winding. The coil form includes a base defining a loop defined by a pair of opposed first sides and a pair of opposed second sides, a plurality of spaced apart support members extending from the base along the first sides, and a coil support structure extending from the base at each of the second sides. Each support member includes a first portion and a second portion, the first portion extending from the base and the second portion extending from the first portion, with a gap is defined between adjacent support members. The winding abuts the first portion of at least some of the spaced apart support members and is at least partially secured by the second portions of the support members. The winding abuts each of the coil support structures, and is curved in a saddle shape. | 04-07-2011 |
20110058313 | CLAD INDUSTRIAL PROCESS TRANSMITTER HOUSING WITH CHASSIS - An industrial process transmitter apparatus includes a housing chassis of a first metallic material and a housing skin of a second metallic material. The housing chassis includes a substantially cylindrical body portion, a first circumferentially extending support member located at or near a first end of the body portion of the housing chassis, and a second circumferentially extending support member located at or near a second end of the body portion of the housing chassis opposite the first end. The first circumferentially extending support member extends radially outward from the body portion, and the second circumferentially extending support member extends radially outward from the body portion. The housing skin is fitted over the housing chassis and is in physical contact with both the first and second circumferentially extending support members. The housing skin is spaced from the housing chassis in between the first and second circumferentially extending support members. | 03-10-2011 |
20110057811 | PROJECTED INSTRUMENT DISPLAYS FOR FIELD MOUNTED PROCESS INSTRUMENTS - An industrial process transmitter includes a first process sensor, transmitter circuitry, a housing and an image projector. The first process sensor measures a process variable of an industrial process and generates a sensor signal. The transmitter circuitry is connected to the first process sensor and is configured to operate functions of the process transmitter. The housing includes a window and an image projector. The image projector is connected to the transmitter circuitry and is configured to project an image of information relating to functions of the process transmitter onto the window in the housing. | 03-10-2011 |
20110057707 | Detection and compensation of multiplexer leakage current - A multiplexed input/output (I/O) system detects leakage currents on a selected input channel. The system includes a leakage detection multiplexer connected to provide an output selected from one of a plurality of input channels. In addition, the leakage detection multiplexer provides as part of the output measured leakage currents associated with the selected input channel. Based on the detected leakage currents, a determination can made regarding whether the detected leakage currents have compromised the integrity of the multiplexer output. In addition, the detected leakage current can be used to compensate the output provided by the multiplexer to account for the presence of leakage currents on the selected channel. | 03-10-2011 |
20110054822 | Thermowell vibration frequency diagnostic - An apparatus and a method monitor condition of a temperature measurement point in an industrial process system by sensing vibration frequency of a thermowell positioned in a process fluid flow passage and providing a diagnostic output based upon the vibration frequency sensed. The apparatus includes a temperature measurement point having a thermowell, a vibration sensor, a temperature sensor, and a transmitter. The vibration sensor is fixedly attached to the thermowell, and the temperature sensor is positioned inside a bore cavity of the thermowell. The transmitter is electrically connected to both the temperature sensor and the vibration sensor. | 03-03-2011 |
20110022979 | FIELD DEVICE CONFIGURATION SYSTEM - A system to configure a field device of the type used to calculate a flow of a process fluid. The system includes a flow repository comprising a list of process fluids with which the field device can be used, fluid equation data which provides information related to fluid equations for calculating fluid parameters of the process fluid, a list of primary elements, and primary element equation data which provides information related to primary element equations and fluid equations for calculating flow of the process fluid. The flow application is adapted to retrieve data from the flow repository and to generate information which is used by field device to calculate the flow of the process fluid. | 01-27-2011 |
20100316086 | Online calibration of a temperature measurement point - A system for measuring temperature includes a thermowell, a primary temperature sensor, a reference sensor, and a transmitter. The thermowell has a measurement instrument connection and a side port. The primary temperature sensor extends into the thermowell through the measurement instrument connection, and the reference sensor extends into the thermowell through the side port. The transmitter is connected to each of the primary temperature sensor and the reference sensor. The transmitter has circuitry for measuring temperature based upon signals received from the primary temperature sensor and for concurrently calibrating based upon signals received from the reference sensor. | 12-16-2010 |
20100302008 | SENSOR/TRANSMITTER PLUG-AND-PLAY FOR PROCESS INSTRUMENTATION - A sensor assembly with a sensing element sends a sensor signal from the sensing element to attached process transmitter over sensor connection wires. The sensor assembly has memory circuitry for storing information related to the sensor assembly and interface circuitry that provides for digital communication of the stored information with the attached process transmitter. This digital communication is sent over the sensor connection wires. | 12-02-2010 |
20100274528 | Field device with measurement accuracy reporting - A field device includes a sensor for sensing a process parameter, a processor for producing a measurement value as a function of the sensed process parameter, and a communication interface for transmitting an output based upon the measurement value. The processor also calculates a measurement precision value associated with the measurement value. | 10-28-2010 |
20100269594 | CAPACITIVE GAGE PRESSURE SENSOR WITH VACUUM DIELECTRIC - A field device includes a capacitive gauge pressure sensor configured to measure a gage pressure of a process media. A sensor body of the pressure sensor includes first and second chambers. The second chamber is under vacuum and forms a vacuum dielectric for the pressure sensor. An atmospheric reference port is formed in the sensor body and maintains the first chamber in equilibrium with ambient atmospheric pressure. A process media inlet port of the sensor is configured to couple to a process media source. The sensor includes a conductive deflectable diaphragm between the second chamber and the media inlet port. A capacitive plate is disposed in the second chamber in relation to the diaphragm such that deflection of the diaphragm generates a change in capacitance. The field device also includes sensor circuitry which generates a sensor signal indicative of the gage pressure of the process media, and transmitter circuitry which transmits information relative to the sensor signal over a process communication loop. | 10-28-2010 |
20100259434 | LINE NOISE ANALYSIS AND DETECTION AND MEASUREMENT ERROR REDUCTION - A method includes sensing a process parameter to generate a sensor signal that includes a process signal and line noise components, digitizing the sensor signal at a sample rate, detecting line noise zero crossings in the sensor signal, determining a line noise frequency as a function of the detected line noise zero crossings, and adjusting the sample rate as a function of the line noise frequency to reduce an impact of line noise on the digitized sensor signal. | 10-14-2010 |
20100259362 | Rf cavity-based process fluid sensor - A remote system for sensing a process fluid parameter comprises a cavity, a tuner and a signal coupler. The cavity is configured to resonate at a central frequency that shifts in response to the process fluid parameter. The tuner is configured to tune the central frequency. The signal coupler is configured to receive a query signal, and to transmit an echo signal when the query signal matches the shifted central frequency. | 10-14-2010 |
20100246630 | Thermocouple temperature sensor with connection detection circuitry - An assembly includes a thermocouple, a cold junction sensor, and a circuit. The thermocouple has a process end and a cold junction end. The cold junction end has first and second cold junction terminals. The cold junction sensor is supported near the cold junction end and configured to measure temperature at the cold junction end. The circuit is electrically connected to the cold junction sensor and to the first and second cold junction terminals. The circuit is configured to produce a thermocouple signal as a function of voltage across the first and second cold junction terminals and to produce a cold junction sensor signal as a function of temperature of the cold junction end as measured by the cold junction sensor. The circuit is further configured to calculate a correlation between the thermocouple signal and the cold junction sensor signal. | 09-30-2010 |
20100246542 | Disparate radios in a wireless mesh network - A wireless mesh network that makes use of strategically placed nodes with radios having superior communication range through the use of high gain antennas, MIMO technology, high power transmitters, high sensitivity receivers, a combination thereof, etc. Besides the obvious effect of extending the physical coverage area of a network, the effect of the longer distance links formed by the nodes with superior range is a flattening of the wireless mesh network by reducing hop count, thereby improving performance, latency, reliability, cost, and power consumption among other factors. | 09-30-2010 |
20100207913 | LCD Design for Cold Temperature Operation | 08-19-2010 |
20100177800 | PROCESS TEMPERATURE TRANSMITTER WITH IMPROVED TEMPERATURE CALCULATION - In a process temperature transmitter, a method for providing a process temperature output is described. The method includes providing a measurement current through a circuit including a reference resistor and a resistance temperature device (RTD). A first voltage across the reference resistor is measured while the measurement current flows through it. A first voltage across the RTD is also measured while the measurement current flows through it. A first resistance of the RTD is calculated based on the measured voltage across the reference resistor and the measured first voltage. A first process temperature output is provided based on the first resistance of the RTD. A second voltage is subsequently measured across the RTD while a measurement current flows through it. A second voltage across the reference resistor is then estimated based on the measured second voltage across the RTD and the measured first voltage across the reference resistor. A second resistance across the RTD is calculated based on the measured second voltage and the estimated second voltage. A second process temperature output is provided based on the second resistance. | 07-15-2010 |
20100148982 | Proximity sensor system for industrial process transmitter - A process transmitter for measuring a process variable comprises a process sensor, transmitter circuitry, a transmitter housing, a mounting component, and a non-contact proximity sensor. The process sensor senses a process variable of a process fluid. The transmitter circuitry processes a signal from the process sensor. The transmitter housing receives the process sensor and transmitter circuitry. The transmitter mounting component is connected to the housing to isolate the sensor, the transmitter circuitry or the transmitter housing from the process fluid or an external environment. The non-contact proximity sensor system detects a spatial relationship between the transmitter housing and the transmitter mounting component. | 06-17-2010 |
20100123591 | Universal process transmitter connector - An electrical connector apparatus for use with a field device includes a housing having a first end and a second end, an electrical feedthrough subassembly, and a visual indicator viewable from outside the housing. The first end of the housing is configured to mechanically connect to the field device. The electrical feedthrough subassembly extends through at least a portion of the housing and includes a plurality of electrical conductors configured to provide a removable electrical connection at the second end of the housing and a flameproof barrier disposed between the first and second ends of the housing. The visual indicator has a plurality of illumination modes indicative of a power state of the electrical feedthrough subassembly. | 05-20-2010 |
20100107776 | Flow disturbance compensation for magnetic flowmeter - A transmitter for a magnetic flowmeter comprises a current source, memory and a signal processor. The current source energizes the flowmeter, such that the flowmeter generates an induced electromotive force in response to a process flow. The memory stores a flow configuration that describes a flow pipe disturbance in the process flow. The signal processor determines the flow rate as a function of the induced electromagnetic force, and as a further function of the flow configuration. | 05-06-2010 |
20100095776 | Field device with integrated temperature control - A field device with integrated temperature control comprises a housing, a temperature sensor, a controller and a terminal block. The housing encloses internal components of the field device. The temperature sensor and the controller are located inside the housing. The temperature sensor senses an internal temperature of the field device, and the controller controls the internal temperature by regulating heat supplied to the field device. The terminal block connects to the controller in order to regulate the heater power as a function of the internal temperature. | 04-22-2010 |
20100083731 | Pressure-based diagnostic system for process transmitter - A process transmitter for measuring a process variable in an industrial process comprises a gauge pressure sensor, an excitation source and transmitter circuitry. The gauge pressure sensor measures a pressure difference between a process fluid and a reference volume, and generates a pressure sensor signal representing the pressure difference. The excitation source generates a pressure pulse within the reference volume to influence generation of the pressure sensor signal. The transmitter circuitry is connected to the gauge pressure sensor to provide an output related to a change in the pressure sensor signal due to the pressure pulse. | 04-08-2010 |
20100082122 | PROCESS CONTROL SYSTEM HAVING ON-LINE AND OFF-LINE TEST CALCULATION FOR INDUSTRIAL PROCESS TRANSMITTERS - Methods and systems for assessing transmitter electronics in an industrial process control system comprise generating a process condition reference equation signal, a process condition approximation equation signal, and an accuracy output signal. The process condition reference equation signal is generated using a process condition reference equation and process control inputs. The process condition approximation equation signal is generated using a process condition approximation equation that approximates the reference equation using the process control inputs, and approximation equation coefficients based on the approximation equation and the process control inputs. The approximation equation signal is compared to the reference equation signal at a control room workstation such that the industrial process control system can be adjusted. In one embodiment, the approximation equation coefficients are adjusted and transmitted to process transmitter electronics over a control network. In another embodiment, a parameter of the industrial process control system, such as a primary element or transmitter, is adjusted. | 04-01-2010 |
20100024568 | High pressure magnetic flowmeter with stress resistant electrode assembly - An electrode assembly comprises a housing, an electrode, a retainer and a potting material. The housing has a first end and a second end, with the electrode extending from the first end of the housing to a process flow. The retainer is positioned about the electrode, inside the housing. The potting material fills voids between the first end of the housing and the second end of the housing, such that the potting material limits displacement of the electrode when the electrode head is subject to pressure from the process flow. | 02-04-2010 |
20100011869 | Differential pressure diagnostic for process fluid pulsations - A process pulsation diagnostic system comprises a primary element, a sensor and a processor. The primary element generates a differential pressure along a fluid flow. The sensor samples the differential pressure. The processor generates a pulsation diagnostic based on a standard deviation of the differential pressure, such that the pulsation diagnostic is indicative of a degree of process pulsation in the fluid flow. | 01-21-2010 |
20100011216 | Method of providing secure tamper-proof acquired data from process instruments - Field devices used to measure process parameters can also function as a data historian by storing process data and associated time stamps. In response to a request for stored process data, the field device uses a cipher and a secret method to generate an encrypted validation string that is provided along with unencrypted information including the process data and time stamps. A validation service that maintains a secure database of field devices and their associated ciphers and secret methods can validate the unencrypted information by using the validation string. | 01-14-2010 |
20090314623 | DETECTION OF DISTILLATION COLUMN FLOODING - A method comprises sensing a differential pressure signal, filtering the differential pressure signal, generating a flooding indicator as a function of the filtered differential pressure signal, and indicating the onset of flooding. The differential pressure signal is sensed along a distillation flow path. The filtered differential pressure signal is responsive to a phase inversion along the flow path, and the flooding indicator is responsive to an onset of a flooding condition, based on the phase inversion. The onset of the flooding condition is indicated based on a change in the flooding indicator. | 12-24-2009 |
20090314093 | FIELD DEVICE INCLUDING A CAPILLARY TUBE HAVING A NON-CYLINDRICAL LUMEN - In a particular embodiment, a field device is disclosed that includes a housing defining a fluid cavity and a sensor cavity and having an isolation barrier to isolate the fluid cavity from the sensor cavity. The field device further includes a pressure sensor disposed within the sensor cavity. The pressure sensor includes at least one pressure inlet. The field device also includes a capillary tube extending from the at least one pressure inlet to the fluid cavity through the isolation barrier. The capillary tube includes a lumen having a non-cylindrical shape. | 12-24-2009 |
20090296781 | High vibration thin film RTD sensor - A temperature sensor capable of operation in high vibration environment includes a sensor sheath mounted at the distal end of a mineral insulated cable. A resistance temperature detector (RTD) sensing element is connected to leads of the cable within the sheath. The sheath is filled at least partially with a ceramic thermal adhesive. | 12-03-2009 |
20090211368 | Sensor tube with reduced coherent vortex shedding - A device comprises a sensor tube for placement in a process flow and a flow-modifying element. The flow-modifying element is formed on the sensor tube, in order to reduce flow-induced vibrations by reducing coherent vortex shedding in the process flow. | 08-27-2009 |
20090196374 | Minimal dead time digitally compensated process transmitter - A process transmitter includes a sensor for producing an analog process signal as a function of a process parameter. The uncompensated analog process signal is digitized by an A/D converter and digitally compensated by a digital processor. The digitized signal from the analog-to-digital converter is also band pass filtered. The digitally compensated signal and the band pass filtered signal are combined to produce a transmitter output. | 08-06-2009 |
20090188327 | Flangeless magnetic flowmeter with integrated retention collar, valve seat and liner protector - A magnetic flowmeter comprises a pipe section, an insulating liner, a flangeless retention collar, a liner protector, a coil and an electromotive force sensor. The insulating liner lines the pipe section to form a process flow channel. The flangeless retention collar is located on an end of the pipe section for forming an end-to-end fluid connection to the process flow channel, and the liner protector is formed on the retention collar to provide an end seal for the insulating liner. The coil produces a magnetic field within the process flow channel, and the electromotive force sensor senses an electromotive force generated in fluid flow through the process flow channel. | 07-30-2009 |
20090165424 | Self-crimping fill tube assembly - A crimping system for a fill tube of an industrial process transmitter system comprises a collar, a fill tube and crimp jaws. The collar comprises a passageway for receiving the fill tube, and a seat surrounding the passageway. The fill tube extends through the passageway and seat of the collar. The crimp jaws are positioned within the seat to surround the fill tube, and are inserted into the seat to crimp the fill tube. | 07-02-2009 |
20090125713 | Wireless mesh network with secure automatic key loads to wireless devices - A wireless mesh network provides secure communication by encrypting data using one or more encryption keys. A configuration device in communication with a security manager of the network provides a temporary secure communication path between the security manager and a new field device to be added to the mesh network. Cryptographic material and other configuration data can then be transferred between the security manager of the network and the new field device securely via the configuration device. | 05-14-2009 |
20090120181 | Level Measurement Using a Process Vessel Cage - A process fluid level measurement system is configured to measure a level of at least one process fluid in a vessel. The vessel has a cage with at least one annular isolator located inside the cage. The at least one annular isolator has a band-shaped isolator diaphragm. A differential pressure transmitter is operably coupled to the annular isolators) and is configured to generate a level output based, at least in part, upon pressure measured relative to the annular isolator(s) | 05-14-2009 |
20090078054 | DIFFERENTIAL PRESSURE SENSOR ISOLATION IN A PROCESS FLUID PRESSURE TRANSMITTER - A differential pressure transmitter includes first and second process fluid inlets. A differential pressure sensor is disposed within the transmitter and has first and second sensor inlets. A first isolator diaphragm is located proximate the first process fluid inlet and is operably coupled to the first sensor inlet through a first fill fluid volume. A second isolator diaphragm is located proximate the second process fluid inlet and is operably coupled to the second sensor inlet through a second fill fluid volume. Measurement circuitry is operably coupled to the differential pressure sensor and configured to measure an electrical parameter of the sensor and provide an indication of the measured parameter. A third fluid volume substantially surrounds the differential pressure sensor. The third fluid volume exerts a compressive force on the differential pressure sensor. | 03-26-2009 |
20090030634 | Temerature-averaging field device compensation - An average-temperature compensated field device comprises a field module, a temperature-averaging sensor, a microprocessor, and an interface. The field module is configured to characterize a process parameter. The temperature-averaging sensor is configured to generate a compensation signal characterizing an extended region of the field device. The microprocessor is configured to compensate a process signal as a function of the compensation signal. The interface is configured to communicate the process signal via a field device communication protocol. | 01-29-2009 |
20090019938 | Pressure diagnostic for rotary equipment - A system comprises a rotary machine, a sensor and a processor. The rotary machine has a component that operates on a fluid. The sensor senses pressure in the fluid. The processor generates a diagnostic indicative of wear on the component, based on process noise on the pressure. | 01-22-2009 |
20080282806 | Electrostatic pressure sensor with porous dielectric diaphragm - A pressure sensor comprises a first pressure chamber containing fill fluid at a first pressure, a second pressure chamber containing fill fluid at a second pressure, a porous dielectric diaphragm having first and second major surfaces exposed to the first and second pressure chambers, and first and second electrodes positioned with respect to the first and second major surfaces. A method for sensing pressure is also disclosed, comprising applying first and second pressures to fill fluid in first and second pressure chambers of a pressure sensor having a porous dielectric diaphragm, and producing an output representative of a pressure differential between the pressures, as a function of surface charges on first and second major surfaces of the porous dielectric diaphragm. | 11-20-2008 |
20080274772 | INDUSTRIAL PROCESS FIELD DEVICE WITH IMPROVED BATTERY ASSEMBLY - An industrial process field device is provided. The device includes wireless process field device electronics disposed within the industrial process field device and at least one battery cell disposed within the industrial process field device and operably coupled to the wireless process field device electronics. A circuit is provided that senses an electrical characteristic related to the at least one cell and provides an output to a switch to decouple the at least one cell from the industrial process field device electronics in response to certain conditions. Such conditions include too much current flowing from the at least one cell; the voltage of the at least one cell being too low; or a short circuit being generated or otherwise observed. | 11-06-2008 |
20080253058 | Pressure and mechanical sensors using titanium-based superelastic alloy - Pressure and mechanical sensors include a sensing component formed of a titanium and tantalum alloy having an elastic (Young's) modulus of less than about 80 GPa and a tensile strength of greater than about 1,000 MPa. The high strength and low elastic modulus, together with very low temperature dependence of the elastic modulus and very low linear thermal expansion, result in high resolution and precise measurement over a large temperature range. | 10-16-2008 |
20080245158 | Flangeless differential pressure transmitter for industrial process control systems - An industrial pressure transmitter, for use in industrial process control systems, comprises a differential pressure sensor and an integrated process connector connected to the differential pressure sensor. A process fluid flow duct extends through the process connector and receives an industrial process fluid. A primary element is positioned in the process fluid flow duct for producing a pressure differential in the process fluid across the primary element. The differential pressure sensor is connected to the process fluid flow duct to sense the pressure differential across the primary element. | 10-09-2008 |
20080245152 | EXPANSION CHAMBER FOR USE WITH A PRESSURE TRANSMITTER - A pressure monitoring system provides a pressure sensor and a body that has a first coefficient of thermal expansion and includes at least one opening for accessing a process fluid. At least one isolation diaphragm is coupled to the body and positioned in the at least one opening. The at least one isolation diaphragm has a first surface in communication with the process fluid. At least one passageway is located in the body and configured to contain a fill fluid in communication with a second surface of the first isolation diaphragm. The at least one passageway is positioned between the first isolation diaphragm and the pressure sensor. At least one expansion chamber is coupled to the first passageway and includes an insert having a second coefficient of thermal expansion. The first coefficient of thermal expansion of the body is greater than the second coefficient of thermal expansion of the insert. | 10-09-2008 |
20080229839 | SENSOR WITH COMPOSITE DIAPHRAGM CONTAINING CARBON NANOTUBES OR SEMICONDUCTING NANOWIRES - A sensor preferably capable of high resolution sensing over a large operating range includes a composite diaphragm containing nanotubes or nanowires. The nanotubes or nanowires preferably form a mat that is embedded in insulating material, such as high dielectric or insulating thin films. The nanotubes or nanowires may provide the diaphragm with a Young's modulus of greater than about 1000 GPa and a tensile strength of greater than about 100 GPa. The strain in the nanotubes or nanowires may be measured by a change in resistance, voltage, current or capacitance. | 09-25-2008 |
20080223140 | Industrial pressure sensor having enhanced dielectric fill fluid - A capacitive pressure sensor for an industrial process transmitters comprises a housing, a sensing diaphragm, an electrode and a fill fluid. The housing includes an interior cavity and a channel extending from an exterior of the housing to the cavity. The sensing diaphragm is disposed within the interior cavity opposite the electrode. The fill fluid occupies the interior cavity such that a pressure from the channel is conveyed to the sensing diaphragm to adjust a capacitance between the electrode and the sensing diaphragm. The fill fluid has a dielectric constant higher than about 3.5. In various embodiments, the pressure sensor has a diameter less than approximately 3.175 centimeters (˜1.25 inches), the electrode has a diameter less than approximately 1 cm (˜0.4 inches), the pressure sensor has a capacitance of approximately 5 to approximately 10 pico-farads, and the fill fluid is comprised of hydraulic fluid having a liquid additive. | 09-18-2008 |
20080218333 | Mode Selectable field transmitter - A selectable mode field transmitter is configurable to operate in one of a plurality of operating modes having different combinations of function, performance, and power consumption. The selectable mode field transmitter includes a housing, a sensor located within the housing, and transmitter circuitry for transmitting data provided by the sensor to a receiver external to the housing. The transmitter circuitry includes a controller that electrically configures the transmitter circuitry to one of a plurality of operational modes in response to mode selection data received from a source external to the housing. Therefore, the selectable mode field transmitter can be configured based on the needs or requirements of a particular application. | 09-11-2008 |