Rosemount Analytical Inc. Patent applications |
Patent application number | Title | Published |
20160091458 | OXYGEN SENSOR WITH ELECTROCHEMICAL PROTECTION MODE - A process analytic instrument includes a measurement cell and an analyzer circuit. The measurement cell includes a solid state electrochemical oxygen sensor configured for exposure to a process gas. The analyzer circuit is coupled to the solid state electrochemical sensor to measure an electrical parameter of the solid state electrochemical sensor and provide an output indicative of oxygen in the process gas. A DC bias circuit is configured to selectably bias the solid state electrochemical oxygen sensor with a direct current when the solid state electrochemical sensor is in a reducing environment. | 03-31-2016 |
20160091418 | OPTICAL GAS SENSING APPARATUS WITH EXPLOSION-PROOF ENCLOSURE - An optical gas sensing apparatus includes an explosion-rated device electronics enclosure. An explosion-rated sensing enclosure has a light transmitting element to allow light to pass out of and into the sensing enclosure. The sensing enclosure is operably coupled to the explosion-rated device electronics enclosure by a feed-through. In one aspect, an internal volume of the sensing enclosure is less than or equal to about one fiftieth of the volume of the explosion-rated device electronics enclosure. In another aspect, the thickness of the light transmitting element is less than or equal to about 3 millimeters. A light source is disposed within the sensing enclosure and is operably coupled to the device electronics. A detector is disposed within the sensing enclosure and is also operably coupled to the device electronics. | 03-31-2016 |
20150233880 | SOLID STATE GAS DETECTION SENSOR DIAGNOSTIC - A metal oxide semiconductor-based toxic gas detector is provided. The metal oxide semiconductor-based detector includes a metal oxide semiconductor-based gas sensor that has an electrical characteristic that varies with concentration of a toxic gas. Measurement circuitry is coupled to the metal oxide semiconductor-based gas sensor and is configured to measure the electrical characteristic and provide a digital indication of the measured electrical characteristic. A controller is coupled to the measurement circuitry and is configured to provide a toxic gas output based on the digital indication. The controller is also configured to provide a diagnostic output relative to the metal oxide semiconductor-based sensor based on fluctuations of the measured electrical characteristic over time. | 08-20-2015 |
20150233838 | COLORIMETRIC ANALYZER WITH DE-BUBBLING - A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The measurement cell has an illumination source and an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the reacted sample to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to generate an analytic output based on a signal from the illumination detector. A fill conduit is operably interposed between the reaction chamber and the measurement cell. The fill conduit is configured to reduce bubbles. | 08-20-2015 |
20150099304 | PHOTOMETRIC MEASUREMENT CELL - An online colorimetric analyzer that generates an indication of a material in a sample is provided. The analyzer includes a peristaltic pump configured to convey. A photometric cell is operably coupled to the peristaltic pump to receive the sample. An illumination source is disposed to direct illumination through the sample in the photometric cell along an angle of incidence. A photodetector disposed to receive illumination passing through the photometric cell along the angle of incidence and provide a signal indicative of a color of the sample. A controller is coupled to the illumination source, the photodetector and the peristaltic pump. The photometric cell is tilted relative to vertical such that a surface of liquid present when the photometric cell is partially filled substantially reflects the illumination away from the angle of incidence. | 04-09-2015 |
20150099303 | MULTIPLE WAVELENGTH LIGHT SOURCE FOR COLORIMETRIC MEASUREMENT - A colorimetric wet chemistry analyzer for determining a concentration of an analyte of interest in a sample is provided. The analyzer comprising includes a reaction chamber configured to receive the sample and facilitate a reaction that changes a color of the sample based on the concentration of the analyte of interest. A photometric cell is operably coupled to the reaction chamber to receive the sample and direct illumination therethrough. The photometric cell has a first illumination source configured to provide illumination at a first wavelength through the photometric cell and a second illumination source configured to provide illumination at a second wavelength through the photometric cell. The second wavelength is different than the first wavelength. A photo detector is configured to detect illumination passing through the photometric cell. A controller is coupled to the first illumination source, the second illumination source and the photo detector and is configured to provide an indication of concentration relative to the analyte of interest based on a signal from the photo detector. | 04-09-2015 |
20140375995 | TUNABLE DIODE LASER ABSORBPTION SPECTROSCOPY WITH WATER VAPOR DETERMINATION - A gas absorption spectroscopy system and method are provided. A sealed chamber is provided with a reference gas having a known moisture concentration. An illumination source is disposed in the sealed chamber and is configured to generate an illumination beam. A measurement cell is coupled to the sealed chamber and is configured for exposure to a gas sample such that illumination travelling through the measurement cell passes through the gas sample. A process window is disposed between the sealed chamber and the measurement cell. The process window is configured to receive the illumination beam from the illumination source and reflect a first portion of illumination while allowing a second portion of illumination to pass into the measurement cell. A reference detector is disposed to receive the first portion of illumination and provide a reference detector signal. A measurement detector is disposed to receive the second portion of illumination after the second portion of illumination has passed through the measurement cell and provide a measurement detector signal. A controller is coupled to the reference detector and the measurement detector and is configured to provide a compensated moisture output based on the reference detector signal and the measurement detector signal. | 12-25-2014 |
20140375989 | ALIGNMENT SYSTEM FOR LASER SPECTROSCOPY - An adjustable mount for an optical device in a laser spectroscopy system is provided. The adjustable mount includes body configured to mount to a process and a reflector mount having a feature configured to mount an optical device. An interface between the body and the reflector mount allows relative motion between the reflector mount and the body. At least one alignment device is configured to engage the reflector mount and the body to fix a position of the reflector mount relative to the body. An optical device is removably mounted to the reflector mount independent of the alignment device and is sealed to the reflector mount. | 12-25-2014 |
20140356971 | HYDROGEN SULFIDE GAS DETECTOR WITH HUMIDITY AND TEMPERATURE COMPENSATION - A hydrogen sulfide gas detector is provided. The detector includes a metal oxide semiconductor-based hydrogen sulfide gas sensor having an electrical characteristic that varies with hydrogen sulfide gas concentration. Measurement circuitry is coupled to the metal oxide semiconductor-based hydrogen sulfide gas detector to measure the electrical characteristic. A controller is coupled to the measurement circuitry and is configured to receive an indication of the electrical characteristic of the hydrogen sulfide gas sensor as well as an indication of ambient humidity. The controller is configured to provide a compensated hydrogen sulfide gas concentration output based on the indication of the electrical characteristic of the hydrogen sulfide gas sensor, an indication of ambient temperature, and the indication of ambient humidity. | 12-04-2014 |
20140338422 | IN SITU HEATED OXYGEN PROBE WITH INTRINSICALLY SAFE OUTPUT - An in situ oxygen analyzer having an intrinsically-safe output and a heated probe is provided. The probe is extendable into a source of process gas and has an oxygen sensor and heater disposed therein. The heater is configured to heat the oxygen sensor to a temperature sufficient to operate the oxygen sensor. A housing is coupled to the probe and has first and second chambers. The first chamber is explosion-rated and includes non-intrinsically safe circuitry coupled to the heater to energize the heater. The second chamber contains only intrinsically-safe circuitry that complies with an intrinsically-safe specification. The first and second chambers are isolated from one another. The non-intrinsically-safe circuitry is coupled to the intrinsically-safe circuitry through an energy-limiting isolator. | 11-20-2014 |
20140295570 | IN SITU HEATED PROCESS PROBE - A process combustion transmitter is provided. The transmitter includes a process probe extendible into a flow of process combustion exhaust. The process probe has a measurement cell with an operating temperature that is above a flashpoint of process combustion fuel. The process probe includes a heater configured to heat the measurement cell to the operating temperature. Electronic circuitry is coupled to the measurement cell and to the heater. The electronic circuitry is configured to disengage power to the heater once process combustion heat is sufficient to maintain the measurement cell at the operating temperature and thereafter to maintain the heater in a de-energized state. | 10-02-2014 |
20140295356 | IN SITU FLUE GAS ANALYZER WITH IMPROVED PROCESS COMMUNICATION - An in situ flue gas analyzer includes a probe extendable into a flue. The probe has a measurement cell providing a signal responsive to a concentration of a gas within the flue. A controller is coupled to the probe and configured to provide an output based on the signal from the measurement cell. A first media access unit is coupled to the controller and is operably coupleable to a first process communication link. The first media access unit is configured to communicate in accordance with an all-digital process communication protocol. A second media access unit is coupled to the controller and is operably coupleable to a second process communication link. The second media access unit is configured to communicate in accordance with a second process communication protocol that is different than the all-digital process communication protocol. The first and second media access units are enabled simultaneously. | 10-02-2014 |
20140290329 | IN SITU PROBE WITH IMPROVED DIAGNOSTICS AND COMPENSATION - A process combustion transmitter is provided. The transmitter includes a process probe extendible into a flow of process combustion exhaust. The process probe has a measurement cell and a diffuser that define a chamber within the process probe. Electronic circuitry is coupled to the measurement cell and is configured to provide an indication relative to a combustion process based on an output signal of the measurement cell. A pressure sensor is coupled to the electronic circuitry and is fluidically coupled to the chamber. The electronic circuitry is configured to provide an adjusted calibration based on pressure measured within the chamber during a calibration. | 10-02-2014 |
20140260539 | GAS CHROMATOGRAPH WITH IMPROVED OPERATION - A gas chromatograph includes a sample inlet configured to receive a sample of interest and a carrier gas inlet configured to receive a carrier gas. A plurality of fluid flow valves are operably coupled to the sample inlet and the carrier gas inlet. A detector is operably coupled to the plurality of fluid flow valves and is configured to provide an analytic indication relative to the sample of interest. A controller is operably coupled to the plurality of fluid flow valves and is coupled to memory storing user-configurable information that is accessed by the controller to affect operation of the gas chromatograph. | 09-18-2014 |
20140260538 | FITTINGLESS PNEUMATIC MULTIPORT SELECTOR VALVE FOR ANALYTIC INSTRUMENTS - A pneumatic multiport selector valve and analytic instrument employing said valve are provided. The valve includes a base having a mounting surface configured to mount to the analytic instrument. The mounting surface has a plurality of apertures therein for coupling to flow conduits of the analytic instrument. At least one piston plate has a number of apertures therethrough. The apertures are configured to slidably receive respective pistons. Pistons are disposed in respective apertures of the at least one piston plate. A cushion layer is disposed between the at least one piston plate and the base. The cushion layer has a plurality of apertures to allow actuation gas therethrough. A plate clamps the at least one piston plate to the base. | 09-18-2014 |
20140260532 | PROCESS ANALYTIC DEVICE WITH IMPROVED THERMAL STABILITY - A process analytic device has an input to receive a sample of interest. An analytic detector is operably coupled to receive the sample of interest and to provide an analytic output relative to the sample of interest. A heat pipe is thermally coupled to the analytic detector. In one embodiment, the process analytic device is a process gas chromatograph. | 09-18-2014 |
20140260511 | DIFFUSER DIAGNOSTIC FOR IN-SITU FLUE GAS MEASUREMENT DEVICE - A process gas analysis system is provided. The system includes a probe insertable into a source of process gas and having a distal end and a chamber proximate the distal end. A gas sensor is mounted within the chamber and is configured to provide an electrical indication relative to a species of gas. A diffuser is mounted proximate the distal end of the probe and is configured to allow gas diffusion into the chamber. A source of calibration gas is operably coupled to the probe and is configured to supply calibration gas, having a known concentration of the gas species. Electronics are coupled to the sensor and configured to store a pre-calibration process gas concentration and to measure an amount of time (sensor return time) for the sensor response to return to the pre-calibration process gas concentration. The electronics are configured to compare a measured sensor return time with a known-good sensor return time to provide an indication relative to the diffuser. | 09-18-2014 |
20140208827 | HERMETIC MANIFOLD FOR ANALYTICAL INSTRUMENTS - A planar manifold includes a first, generally planar, layer having a plurality of apertures therethrough. A second layer has a plurality of apertures therethrough. A channel layer defines a plurality of channels therein and is interposed between the first layer and the second layer. At least one channel extends in a direction parallel to a plane of the planar manifold and couples an aperture of the first layer to an aperture of the second layer. | 07-31-2014 |
20140102171 | PROCESS ANALYTIC INSTRUMENT WITH ENCAPSULATED FLAME-QUENCHING CONNECTION - A process analytic instrument and tube carrier are provided. The process analytic instrument includes an analytic module having a plurality of inlets and configured to analyze a process gas. The tube carrier is coupled to the analytic module and has a shell defining an interior therein. A plurality of tubes terminates in the tube carrier. At least one of the tubes has an integral flame-quenching pathway and the interior of the shell proximate the integral flame-quenching pathway is filled with a solid. | 04-17-2014 |
20130187673 | LOW-CONDUCTIVITY CONTACTING-TYPE CONDUCTIVITY MEASUREMENT - A method of measuring low conductivity of a liquid sample using a contacting-type conductivity sensor is provided. The method includes applying a first excitation current to a contacting-type conductivity sensor at a first drive frequency. A first voltage response to the first excitation current is determined. A second excitation current is applied to the contacting-type conductivity sensor at a second drive frequency higher than the first drive frequency. A second voltage response to the second excitation current is determined. A conductivity output is provided based, at least in part, on the first and second voltage responses. A system for measuring conductivity of a liquid at or below 100 μS/cm is also provided. | 07-25-2013 |
20130145814 | FLAME SAFETY SYSTEM FOR INSITU PROCESS ANALYZER - A method of operating a process a combustion analyzer having a measurement cell is provided. The method includes exposing the measurement cell to exhaust of a combustion process where fuel and oxygen are combined in a burner to produce a flame. The measurement cell is heated to a temperature above a flashpoint of the fuel. When a condition is detected, such as a fault or abnormal situation, gas is directed to the measurement cell to form a gaseous barrier between the measurement cell and unburned fuel while the detected condition exists. Once the condition abates, the gas flow is disengaged and process combustion gas measurements are provided | 06-13-2013 |
20130098140 | PROCESS ANALYTIC INSTRUMENT WITH MULTI-TUBE CONNECTION - A process analytic instrument includes an analytical module configured to analyze a process fluid and a removable tube carrier coupled to the analytical module. The analytical module has a plurality of inlet ports in a sealing surface. The removable tube carrier has an end with a plurality of apertures aligned with the plurality of inlet ports of sealing surface of the analytical module. The removable tube carrier fluidically couples a plurality of tubes to the analytical module when the end of the removable tube carrier is biased into the sealing surface of the analytical module. | 04-25-2013 |
20130032461 | FLAME-QUENCHING KEYPAD ASSEMBLY - A process analytic device includes a metallic enclosure having electronics disposed therein. The enclosure has an enclosure wall with a reference surface. A plurality of operating rods is provided. Each operating rod is configured to pass through an aperture in the enclosure wall and to cooperate with the enclosure wall to provide a flame quenching pathway. A plurality of electrical switches is provided where each electrical switch is aligned with a respective operating rod, and is mounted a controlled distance from the reference surface. Each operating rod transfers movement to a respective electrical switch through the flame quenching pathway. | 02-07-2013 |
20110098939 | PROCESS ANALYTIC SENSOR WITH LOW POWER MEMORY WRITE FUNCTION - A process analytic sensor is provided. The process analytic sensor includes a process analytic sensing element that is coupleable to a process. The process analytic sensing element has an electrical characteristic that varies with an analytical aspect of the process. A microcontroller is disposed within the process analytic sensor and is coupled to the process analytic sensing element to sense the electrical characteristic and provide an analytical signal based on the sensed characteristic. The microcontroller is operable on as little as 0.5 milliamps and includes electrically erasable programmable read only memory (EEPROM) that can be written while the microcontroller operates on as little as 0.5 milliamps. | 04-28-2011 |
20080283399 | POTENTIOMETRIC PROCESS ANALYTIC SENSOR WITH ISOLATED TEMPERATURE SENSOR - A sensor for analyzing a liquid sample is provided. The sensor includes a sensor body defining a chamber therein. A sensing cell is disposed within the chamber and is adapted to contact the sample solution. The sensing cell has a sensing cell fill solution therein, and a sensing electrode disposed within the sensing cell fill solution. A reference fill solution is disposed within the sensor body. A reference junction is arranged to contact the reference fill solution and the sample solution. A temperature sensitive device is disposed within the body and is configured to provide a temperature sensitive device output. A reference electrode is disposed within the sensor body in contact with the reference fill solution. A solution ground electrode is disposed within the sensor body and spaced from the reference electrode. | 11-20-2008 |