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Gas

Subclass of:

073 - Measuring and testing

073100010 - INSTRUMENT PROVING OR CALIBRATING

073100020 - Gas or liquid analyzer

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
073100060 Gas 89
20090113982Multi-dimensional explosive detector - A system and methodology for the trace detection of organic explosives is described. The detector system combines a separation system, such as a gas chromatograph to separate the components of an explosive mixture, with a pyrolysis detector. In operation, effluent from the separation system is pyrolyzed and the fragments produced on pyrolysis of the explosive compound are then detected. The small molecule fragments exhibit sharply banded, characteristic spectrum, enabling detection of the explosive materials. The system is tested using the explosive materials nitrobenzene and 2,4-dinitrotoluene, and with the nitramine explosive tetryl. Detection limits are 25 ng for nitrobenzene, and 50 ng for 2,4-dinitrotoluene. Tetryl is detected with a detection limit of 50 ng.05-07-2009
20110192211APPARATUS WITH ABNORMALITY DETERMINATION FUNCTION AND METHOD FOR DETERMINING ABNORMALITY - The apparatus 08-11-2011
20100116017CALIBRATION CARD FOR PHOTOLUMINESCENT OXYGEN SENSORS - A calibration card and method of manufacturing and using the card to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The card includes at least (a) a first mass of a first solid state composition comprising an oxygen-sensitive photoluminescent dye that is the same as the probe dye, embedded within an oxygen-permeable carrier matrix that is the same as the probe carrier matrix, wherein the first composition has a first sensitivity to oxygen, and, (b) a second mass of a second solid state composition comprising an oxygen-sensitive photoluminescent dye that is the same as the dye in the first mass, embedded within a carrier matrix that is different from the carrier matrix in the first mass, wherein the second composition has a known second sensitivity to oxygen that is less than the first sensitivity to oxygen.05-13-2010
20090120158Articles Of Manufacture Containing Increased Stability Low Concentration Gases And Methods Of Making And Using The Same - Articles of manufacture and methods of making and using same concern a container having an internal space and a passivated internal metal surface. The container contains a composition of an acid gas and a balance gas contained within the internal space and in contact with the passivated internal metal surface. The stability of the acid gas concentration over time is enhanced.05-14-2009
20130086972CALIBRATION TECHNIQUE FOR CALIBRATING A ZIRCONIUM OXIDE OXYGEN SENSOR AND CALIBRATED SENSOR - A method of calibrating a zirconium oxide sensor employing a reference gas having a known mole fraction of oxygen and a monitored gas having a known mole fraction of oxygen, characterized by use of a reference gas and a monitored gas having the same mole fraction of oxygen but different partial pressures of oxygen. This allows a single gas source, such as air, to be used for both the reference gas and the monitored gas across a range of oxygen concentration readings.04-11-2013
20120216593ELECTRONIC CHEMICAL TRACE DETECTOR - A hotplate chemical trace detector comprising a heatable conducting plate with a heater element having a predetermined temperature-power characteristic. A balancing circuit comprises an adjustable resistor for tuning the heater element to a predefined resistor value. A processor is provided for adjusting the adjustable resistor so as to provide a stabilized temperature in said heatable conducting plate and a detection circuit is provided for detecting a change of resistance in the heatable conducting plate in accordance with the presence of a chemical trace reacting in the presence of the conducting plate. According to the invention a test circuit is provided for measuring a dissipated power in the heater element and for calculating a real temperature from the dissipated power in the heater element based on the predetermined temperature-power characteristic.08-30-2012
20090095048Oxygen Sensor Inspection Method and Apparatus and Oxygen Sensor Production Method - There is provided an inspection method of an oxygen sensor, which includes a sensing portion having a reference electrode, a sensing electrode and an oxygen ion conducting solid electrolyte layer arranged between the reference electrode and the sensing electrode. The inspection method contains the steps of reading a first output value of the oxygen sensor under a condition that the sensing portion of the oxygen sensor is subjected to a first inspection gas and then a second output value of the oxygen sensor under a condition that the sensing portion of the oxygen sensor is subjected to a second inspection gas different in oxygen concentration from the first inspection gas and judging the oxygen sensor to be defective or nondefective based on the first and second output values.04-16-2009
20130255352METHOD FOR MANUFACTURING SENSOR ELEMENT FOR USE IN GAS SENSOR, INSPECTING ELECTRICAL CHARACTERISTICS OF SENSOR ELEMENT, AND PRE-TREATING SENSOR ELEMENT - To provide a method for manufacturing a sensor element, by which stabilization of an electrode, which is performed prior to inspecting element characteristics, can be performed for a shorter time period and in a more reliable manner than in the conventional. The sensor element includes: an oxygen-ion conductive solid electrolyte layer; a first electrode that is formed on a surface of the oxygen-ion conductive solid electrolyte layer; and a second electrode that is formed in a space provided inside the oxygen-ion conductive solid electrolyte layer, and that is configured to reduce said predetermined gas component. As the pre-treatment, by an external power source. a voltage is applied between the first electrode and the second electrode, to thereby decompose and remove a gas component attached to the second electrode.10-03-2013
20090056408PORTABLE METERED FLOW APPARATUS FOR CALIBRATION/BUMP TESTING - A portable metered flow apparatus for accurately providing calibration gas from a calibration gas source to a gas monitoring instrument in order to permit calibration/bump testing of the instrument comprising a regulator and a gas delivery device that includes a solenoid valve, an electronic timing circuit, means for providing power to the solenoid valve and the electronic timing circuit, a power switch for activating the electronic timing circuit, means for activating the release of calibration gas; and optionally one or more LED lights. A method for calibration/bump testing of a gas monitoring device utilizing the portable metered flow apparatus is also provided.03-05-2009
20130160518RELATIVE HUMIDITY SENSOR AND METHOD FOR CALIBRATION THEREOF - A device having an integrated circuit that includes a relative humidity sensor as well as a memory element for storing calibration information for the relative humidity sensor. Because of the nature of fabrication of an integrated circuit for a relative humidity sensor, variances in the creation of electronic components therein may lead to a need to calibrate the sensor after assembly. Such calibration information may be ascertained at the time of fabrication and stored in a memory component disposed on the integrated circuit chip. By storing the calibration information, which may be determined at the time of fabrication, one does not need to determine such calibration information later at assembly or store the already determined calibration information in a remote location until assembly if it was, in fact, ascertained at fabrication. Then, at assembly, one needs only to read the calibration information in order to calibrate the relative humidity sensor.06-27-2013
20120285217METHOD AND DEVICE FOR DETERMINING THE OPERATING STATUS OF A PROBE FOR MEASURING THE AMOUNT OF SOOT IN THE EXHAUST FUMES OF A VEHICLE - The invention provides a measuring device for measuring soot deposition, said device having a measuring probe (11-15-2012
20110289999Method and Device for Calibrating a Sensor - A tank ventilation system having an intake tract, the tank ventilation system including a hydrocarbon reservoir, a sensor, and a valve. The valve and the sensor are arranged in a fluid line that couples the hydrocarbon reservoir to the intake tract. The sensor captures a hydrocarbon concentration of a fluid in the fluid line. A captured value of the hydrocarbon concentration is measured using the sensor. When the open valve, a mass flow of the fluid flowing through the fluid line into the intake tract is captured or determined. An air/fuel ratio of an air/fuel mixture fed to the internal combustion engine is determined. An estimated value of the hydrocarbon concentration in the fluid line is determined according to the mass flow of the fluid and the air/fuel ratio. The sensor is calibrated according to the captured value of the hydrocarbon concentration and the estimated value of the hydrocarbon concentration.12-01-2011
20090282891Method for Diagnosing the Reliability Performance of a Jump Probe - In a change from a lean to a rich exhaust gas mixture, a characteristic behavior appeal's in a short time interval in the vicinity of the lambda jump of an upstream catalytic converter lambda probe in the signal characteristic which is measured by a downstream catalytic converter lambda probe. From the signals in small intervals, around the instant of changing, the reliability performance of the downstream lambda probe can be deduced without the actual probe jump in curves of the voltage characteristics having to be considered.11-19-2009
20100101300METHODS AND APPARATUS FOR MONITORING PARTICLES FLOWING IN A STACK - An apparatus (04-29-2010
20130255353METHOD FOR EVALUATING DEGRADATION OF A PARTICULATE MATTER SENSOR AFTER AN ENGINE START - A system for improving operation of an engine having a particulate matter sensor is presented. The system may be used to improve engine operation during cold starts especially under conditions where water vapor or entrained water droplets are present in vehicle exhaust gases. In one embodiment, particulate sensor degradation is indicated in response to an output of said particulate matter sensor staying below a threshold as engine temperature increases past the dewpoint temperature.10-03-2013
20090288469SELF-CALIBRATING NOx SENSOR - A system for calibrating a response to an exhaust-stream NO11-26-2009
20090188297Temperature and Humidity Compensated Single Element Pellistor - A portable, relatively low power gas detector incorporates a single pellistor-type sensor for sensing an explosive gas of interest. Outputs from the sensor are corrected in accordance with ambient temperature and humidity and pre-stored correction factors based on characteristics exhibited by a plurality of similar sensors.07-30-2009
20100132431METHOD FOR TESTING AND CALIBRATING A CAPACITIVE FLEX FUEL SENSOR - A method for calibrating a flex fuel sensing apparatus having a fuel passage involves the use of a generally solid test blank having a size and shape configured to match that of the fuel passage. The test blank comprises material having a known, predetermined dielectric constant. The test blank is inserted into the fuel passage where the dielectric constant of the test blank is operative to simulate the presence of various gasoline and ethanol fuel blends. The test blank may also comprise a deformable/compressible solid such as rubber where the test blank is compressed during calibration to eliminate air gaps or the like, improving accuracy. The use of the solid test blank reduces complexity compared to using actual gasoline/ethanol blends for calibration as well as reduces post-calibration cleanup.06-03-2010
20110203346COMPREHENSIVE TWO-DIMENSIONAL GAS CHROMATOGRAPHY - The invention provides a manual or automated method for eliminating or minimizing retention time shifts in comprehensive two-dimensional gas chromatography (abbreviated GCxGC). Under nominal identical conditions (identical column-set specifications and GCxGC oven temperature programming), the invention allows one to reproduce the two-dimensional retention times from one column-set to another, from one GCxGC to another or from one column outlet pressure to another. A procedure is described to manually or automatically adjust the head pressure of the primary column and the (effective) secondary column length to compensate for the two-dimensional retention time differences.08-25-2011
20080307852Method and Device for the Calibration of an Exhaust Gas Probe, and Method and Device for the Operation of an Internal Combustion Engine - A plateau phase of a test signal of an exhaust gas probe located in a catalytic converter is detected following a jump from a preset rich air/fuel ratio in a combustion chamber of one cylinder to a preset lean air/fuel ratio, the plateau phase being obtained following the jump, and the duration is determined as a storage period. A plateau phase of the test signal, which is obtained following a jump from a preset lean air/fuel ratio to a preset rich air/fuel ratio, is detected following the jump, and the duration of the plateau phase is determined as an evacuation period. An allocation rule for assigning the test signal to a detected air/fuel ratio is adjusted according to the storage period and the evacuation period. To calibrate the exhaust gas probe, the allocation rule is adapted according to a plateau value of the test signal during the plateau phase.12-18-2008
20090314052Method for Calibrating a Mass Spectrometric Sniffing Leak Detector - Usually, a sniffing leak detector must be calibrated for each tracing gas. The calibration comprises ranging of the spectral positions into the mass spectrum and the amplitude height. At least one mass line is determined with a calibrating gas. The mass lines lying between two mass lines and/or between a zero point and a line are determined by interpolation and/or extrapolation. In this manner, a sniffing leak detector can be used for such tracing gases which have not previously been used for calibration purposes.12-24-2009
20090314053Device for calibration of a humidity sensor and a sensor arrangement with a humidity sensor which may be calibrated - A device for calibration of a humidity sensor with a measuring chamber includes a first gas connector for connection to a pressurizing unit and a second gas connection for connection to a further gas chamber. The first and/or the second gas connector may have a flow resistance which may be adjusted to two different fixed values.12-24-2009
20120291517PRE-CALIBRATED REPLACEABLE SENSOR MODULE FOR A BREATH ALCOHOL TESTING DEVICE - The present invention describes a replaceable breath alcohol sensor module that can be replaced with a new pre-calibrated breath alcohol sensor module or re-calibrated. The breath alcohol sensor module requiring calibration can be removed from the body of a Breath Alcohol Testing Device (commonly called “breathalyser” or “breathalyzer”). The breath alcohol sensor module can be separately calibrated for accurate calculation of “percent blood alcohol concentration” (% BAC) based on breath air samples and then re-installed into the breath alcohol tester or the old breath alcohol sensor module can be replaced with a new pre-calibrated breath alcohol sensor module. The present invention improves upon and/or replacing the current method of re-calibration at a breathalyzer service center.11-22-2012
20090178460GAS AMOUNT MEASUREMENT DEVICE - A gas amount measuring device including a vacuum container, a first pipe, an air release valve being attached to the first pipe, a second pipe, a calibration gas generator being attached to the first pipe, a third pipe, a vacuum gauge, a first valve, a leak valve, a second valve, a turbomolecular pump, a third valve, and a roughing pump being attached to the third pipe in order from a vacuum container side, a first bypass pipe connecting the third pipe between the vacuum container and the first valve to the third pipe between the leak valve and the second valve, a fourth valve being attached to the first bypass pipe, and a second bypass pipe connecting the third pipe between the leak valve and the second valve to the third pipe between the third valve and the roughing pump, a fifth valve being attached to the second bypass pipe.07-16-2009
20090139299INNOVATIVE GAS MONITORING WITH SPACIAL AND TEMPORAL ANALYSIS - The present invention relates to the monitoring of gas concentrations possible in very low ranges (i.e., low ppb and even ppt ranges) and especially use thereof in environmental monitoring, exposure assessment, bomb detection, and health studies. The invention can use a spatial and temporal assessment of gas concentrations that enables the sources of the gas in question to be located and identified which is useful in environmental and health field but can also be applied to other fields an example of which is detecting and locating explosives. This technology can uses small, light weight, and low power components that allow for the monitor to be portable and even worn on a person as a personal monitor. This technology can be used in a stationary monitors as well.06-04-2009
20090100898System, apparatus and method for dispensing chemical vapor - This invention relates to a system for testing the operation of a detection instrument, which comprises a first enclosure having at least two ports and containing a fluid comprising a substance detectable in gas form by the instrument, said fluid being present in part as a vapor phase and in part as a liquid phase in equilibrium with one another, said first enclosure being interconnected with the instrument such that the fluid contained in the first enclosure can be dispensed to the instrument via at least one port of said first enclosure; a second enclosure having at least one port and containing either the same or a different fluid in gas form as compared with the first enclosure, said second enclosure being adapted for selective dispensing of a known or ascertainable mass of the fluid contained therein via at least one port thereof, and being interconnected with the first enclosure such that said mass can be introduced into the volume within said first enclosure through at least one port thereof, thereby to displace a correlative mass of the vapor phase fluid contained in the first enclosure causing said correlative mass to be dispensed to said instrument; and a valve in communicating relationship with said first enclosure and positioned such that, when the first enclosure is interconnected with said instrument, the valve is interposed between the interconnected first enclosure and instrument, which valve is capable of selectively permitting flow to said instrument of said vapor phase fluid dispensed from the first enclosure upon being displaced by said introduction of fluid from the second enclosure; the invention also relates to apparatus for implementing and a method involving same.04-23-2009
20100257915MEASUREMENT SYSTEM FOR POWDER BASED AGENTS - A measurement system for a dry powder agent includes a sensor system which includes at least one sensor head at least partially within a powder calibration column and a control system in communication with the sensor system.10-14-2010
20090044593Method and Apparatus for Calibrating a Relative Humidity Sensor - The invention relates to a method for calibrating the relative content (RH) of water. According to the invention, at least one calibration point is defined at a known partial pressure (Pw) of water vapour and sensor temperature of the sensor. According to the invention, at the same known partial pressure (Pw) of water the sensor (02-19-2009
20100242569APPROACH FOR DETERMINING EXHAUST GAS SENSOR DEGRADATION - A method for determining degradation of an exhaust gas sensor positioned in an exhaust system for an internal combustion engine of a vehicle is provided. The method includes modulating an air/fuel ratio of gas exhausted by the internal combustion engine to the exhaust system through a cycle that includes at least one rich-to-lean transition and at least one lean-to-rich transition, indicating a degradation condition of the exhaust gas sensor in response to at least one of a rich-to-lean response duration of the exhaust gas sensor and a lean-to-rich response duration of the exhaust gas sensor being greater than a delay threshold, and indicating the degradation condition of the exhaust gas sensor in response to a ratio of the rich-to-lean response duration to the lean-to-rich response duration being greater than an asymmetry threshold that is relative to an axis of symmetry of the rich-to-lean response duration versus the lean-to-rich response duration.09-30-2010
20080307851EXHAUST TEMPERATURE SENSOR MONITORING - A system for diagnosing an exhaust temperature sensor in an engine exhaust, the exhaust further including an emission control device, the system comprising an exhaust temperature sensor disposed in the exhaust pathway for indicating temperature; an air/fuel ratio sensor having a heater, the air/fuel ratio sensor disposed in the exhaust pathway; and a control system, the control system enabling and disabling the air/fuel ratio sensor heater based on operating conditions, the controller further adjusting fuel injection to provide a desired air-fuel ratio based on feedback from the air/fuel ratio sensor when the heater is enabled, and determining degradation of the exhaust temperature sensor based on a signal from the air/fuel ratio sensor when the heater is disabled.12-18-2008
20090038371Method and Apparatus for Evaluation of a Device for Measuring Lung Diffusion Capacity - A method of evaluating a measuring device for measuring, in normal operation, a diffusion capacity of a person's lungs by measuring a change of concentration of a gas species in a mixture, when the mixture is inhaled and subsequently exhaled by the person or imposed by an artificial ventilator, the method comprising the steps of: (a) receiving the mixture in a compartment; (b) circulating gas from the compartment back to the compartment through a circulation circuit; and (c) selectively reducing partial pressure of the gas species in the circulation circuit to a predetermined level. A device for implementing the evaluation method is also disclosed.02-12-2009
20090071226TEST ADAPTER FOR A GAS-MEASURING DEVICE - A test adapter for the saturated vapor calibration of gas-measuring devices. The test adapter (03-19-2009
20100300175EXHAUST GAS ANALYZER AND PROBE UNIT - A probe unit includes a gas sensor having multiple gas introduction bores for introducing a gas into an inside of the gas sensor, and a sensor holder inside of which the gas sensor is held and that is arranged inside of a duct so as to introduce an exhaust gas flowing in the duct into the gas sensor. A calibration gas flow channel is arranged in the sensor holder and has an opening at an inner surface of a side wall, surrounding the gas introduction bores of the gas sensor, of the sensor holder so as to supply a calibration gas to the gas sensor. A guide groove is arranged continuous to the opening of the calibration gas flow channel and arranged on the inner surface of the side wall along an arranging direction of the multiple gas introduction bores to face the multiple gas introduction bores.12-02-2010
20100223975Calibration and Accuracy Check System for a Breath Tester - Calibration and accuracy check systems for a chemical sniffer, such as a breath alcohol tester, which utilize the dispensing of droplets with determinable concentration of alcohol and/or other liquids in a determinable number either directly to a reaction chamber, or into a carrier gas which can be sampled. The systems generally provide for accurate sample concentration being provided to the breath tester while also providing for a simplified system which can be easier to move, and require less operational complexity, than prior wet or dry calibrating systems.09-09-2010
20100212395Instrument Docking Station with Non-Destructive Sensor Analysis Capabilities - A docking station for use with gas sensors includes limited test and diagnostic circuitry directed to specific characteristics of selected detectors. Where a family of detectors is to be evaluated, a universal interface for that family can be included. A single port can be used for multiple different detectors irrespective of specific detector characteristics.08-26-2010
20120144894METHOD FOR START-UP OF A MEASURING DEVICE - A method for start-up of a measuring device, which is embodied to monitor by means of at least one measuring transducer in contact with the interior of a process container, especially of a single-use container, a measured variable of a medium contained in the process container, wherein, for ascertaining a measured value, at least one measurement signal of the measuring transducer is mapped to a measured value of the measured variable according to a predetermined characteristic curve, wherein the method includes: introducing a process medium into the process container; bringing the measuring transducer in contact with the process medium; and performing a one-point calibrating of the measuring device based on a measurement signal registered by the measuring transducer in the process medium or a measured value derived therefrom based on the characteristic curve.06-14-2012
20110100087SENSOR FOR GASES EMITTED BY COMBUSTION - A sensor for gases emitted by combustion, said sensor comprising one or more metal oxides forming an adsorption semiconductor the electrical resistance of which changes according to the gas adsorbed, said semiconductor being a semiconductor for the direct adsorption of gases without catalyzed chemical reaction, said sensor being arranged to detect nitrogen oxides in the case of a bright fire, and/or said sensor being arranged to detect, in the case of a smoldering fire, partially unburned gases, in particular alcohols, aldehydes, ketones, carboxylic acids or amines.05-05-2011
20110048100GAS DETECTOR WITH VISUAL COMPLIANCE VERIFICATION - A multi-sensor gas detector includes circuitry to evaluate if the detector is in compliance with predetermined safety requirements. Where the detector is in compliance, then a confidence indicator is intermittently activated at a predetermined frequency. Where the detector is out of compliance, the indicator is not activated providing indicia that the detector needs maintenance.03-03-2011
20110174049INSPECTION APPARATUS FOR SENSOR ELEMENT, AND METHOD FOR INSPECTING ELECTRICAL CHARACTERISTICS OF SENSOR ELEMENT - An inspection apparatus including a cylindrical chamber having an opening part and a bottomed end part. The chamber includes an element insertion/extraction part, a tapered part, and a gas introduction part. The element insertion/extraction part is a tubular space continuous from the opening part. The tapered part is connected to the element insertion/extraction part, and is a space having a tapered shape in a cross-sectional view sectioned perpendicularly so that a lengthwise direction is larger toward the inner side. The gas introduction part is a tubular space continuously extending from the tapered part to a bottom portion. A sensor element is inserted into the chamber such that a front end thereof reaches the tapered part while a gap is formed between the sensor element and the chamber, and in this condition, an inspection gas is supplied to the chamber through a supply port provided in the gas introduction part.07-21-2011
20110209520CALIBRATION CARD FOR OXYGEN OPTICAL SENSORS - A calibration card 09-01-2011
20110072879SYSTEMS AND METHODS FOR REMOTELY CALIBRATING A GAS SENSOR - A method of calibrating a sensor that includes determining a baseline condition of a sensor by channeling a fluid to a remote calibrator assembly coupled to the gas sensor, wherein the remote calibrator assembly includes a calibrator slide. The calibration of the sensor is determined by channeling a calibration fluid to the remote calibrator assembly, wherein during the calibration process, the calibrator slide moves to a calibration position. The calibrator slide moving to an operational position is verified, which is indicative of the sensor being in normal operating condition.03-31-2011
20090308134TEST EQUIPMENT FOR TESTING HAZARD DETECTORS - Apparatus for testing a hazard detector, the apparatus comprising electrically-powered generating means arranged to generate at least two stimuli for application to the detector; and control means arranged to control the generation of each stimulus by said stimulus generating means, wherein said generating means includes a carbon monoxide generator.12-17-2009
20090113983PARTICULATE MATTER SENSOR ELECTRODES WITH EMBEDDED SELF-CALIBRATOR, AND METHODS USING SAME - A particulate matter (PM) sensor includes an embedded self-calibrator. The PM sensor is to be installed in an exhaust corridor of an internal combustion engine. The PM sensor can self-calibrate by imposing a known potential across a protective housing in which the conductive probe is suspended. An image charge that is imposed upon the conductive probe is fed back and correlated to generate an updated calibration for the PM sensor.05-07-2009
20100031729APPARATUS FOR USE IN SAMPLE MONITORING - An apparatus for use in a sample monitoring system is provided and includes a first enclosure configured to enclose a probe body into which the sample is drawn, a sensor coupled to the probe body and configured to sense a chemical composition of the sample and at least one first heater configured to heat an interior of the first enclosure, a second enclosure configured to enclose a pump coupled to the probe body and configured to draw the sample therein and a second heater configured to heat the pump, and a third enclosure configured to enclose a pump motor configured to control an operation of the pump and to support heating controlling units configured to control the at least one first heater and the second heater.02-11-2010
20130219984METHOD FOR DIAGNOSING AN ELECTRICAL CONTACT CONNECTION OF AN EXHAUST GAS SENSOR - A method diagnoses an electrical contact connection of an exhaust gas sensor, in which two current sources are used to impress currents into a pump cell and a reference cell of the exhaust gas sensor. If a line is faulty, the relevant current cannot flow and a voltage on the relevant current source assumes a high value. If a second line is faulty, measurement of the voltage on the second connection, which is connected to the connecting point between the two cells, provides a low value when the relevant second connection is isolated from the reference-ground potential by a second switch, since the cell capacitances have not been able to charge to the reference-ground potential.08-29-2013
20090165528Method and Apparatus for Gas Filter Testing - A method is described to determine the remaining sorption capacity of activated-carbon-sorbent gas filters by measuring the breakthrough time for a test gas challenge to a test filter with known and controlled test conditions that include flow rate and temperature and the use of a calibration curve that has been established by prior testing of the test filter sorbent medium in calibration tests where the filter is exposed to a known quantity of gas surrogate for the challenge gases that the filter may sorb in service and then testing the test filter medium by challenge with a sparged gas that can be selectively detected to determine the breakthrough as a function of test gas. The apparatus using such a method comprises a portable system that includes a sparging test gas generator, a carrier gas system, a test filter canister holder, and a selective detector that can quantitatively monitor the test gas exiting the test filter canister. The method and apparatus can be used to determine the remaining sorption capacity of activated carbons filters, e.g., ASZM-TEDA carbon filters such as those used for building defense against chemical toxant attack, industrial accidents, and for tactical collective protection and for industrial ventilation and compliance with environmental regulations.07-02-2009
20110314893OXYGEN SENSOR CONTROLLER AND OXYGEN SENSOR CONTROL METHOD - In control over an oxygen sensor, a temperature of the oxygen sensor, which detects a concentration of oxygen in exhaust gas from a combustion chamber in which anode off-gas of a fuel cell is burned, is adjusted to a target temperature, and an output of the oxygen sensor is calibrated. When the temperature of the oxygen sensor is adjusted to the target temperature, a plurality of the target temperatures are set, a calibration target temperature higher than or equal to a first predetermined temperature is selected from among the plurality of target temperatures when the output of the oxygen sensor is calibrated, and a target temperature, which is lower than the calibration target temperature, is selected from among the plurality of target temperatures during power generation of the fuel cell.12-29-2011
20110314892METHOD AND DEVICE FOR THE DYNAMIC MONITORING OF A LAMBDA PROBE - A method for the dynamic monitoring of a first lambda probe arranged in an exhaust-gas duct of an internal combustion engine upstream of an exhaust-gas purification system. A period of an output signal of the first lambda probe is determined in a controller of the internal combustion engine, and a lambda regulating signal is determined from an output signal of a second lambda probe connected downstream of the exhaust-gas purification system. A first threshold value for a lengthening of the period of the output signal of the first lambda probe is predefined, in that a characteristic signal (12-29-2011
20110100088Articles Of Manufacture Containing Increased Stability Low Concentration Gases And Methods Of Making And Using The Same - Articles of manufacture and methods of making and using same concern a container having an internal space and a passivated internal metal surface. The container contains a composition of an acid gas and a balance gas contained within the internal space and in contact with the passivated internal metal surface. The stability of the acid gas concentration over time is enhanced.05-05-2011
20090293581LEAK DETECTOR - A method of measuring the gas flow of an incondensable gas in a flowing mixture of said incondensable gas and a condensable gas comprising the steps of calibrating a leak detector; injecting a known quantity of gauge gas at a known mass flow rate into said flowing mixture of gases; drawing a sample of the said gauge mix off at a sample point; passing said sample through a condenser so as to remove said condensable gas from the gauge mix, resulting in a test mix; passing the said test mix into the leak detector so as to measure the concentration of the gauge gas within the test mix; and calculating the mass flow rate of said incondensable gas within said flowing mixture. There is also provided a method of measuring the rate of ingress of an incondensable gas at an ingress point along a flow path of a flowing mixture of said incondensable gas and a condensable gas.12-03-2009
20120151986ON-DEMAND GAS REGULATOR FOR GAS ANALYZER CALIBRATION - The present invention relates to a gas regulating device (06-21-2012
20110120206METHODS OF CALIBRATING A SENSOR IN A PATIENT MONITORING SYSTEM - The present application discloses a number of methods of calibrating a sensor for measuring an analyte in a patient monitoring system. In a first embodiment, the method comprises calculating a sensor drift; calibrating the sensor using at least one calibration fluid; and periodically updating the sensor calibration based on the sensor drift calculation. In a second embodiment, the system comprises means for adjusting a gas concentration in a fluid, and the method comprises providing a calibration fluid; setting the analyte concentration in the first fluid to a first concentration with said adjusting means; measuring the first analyte concentration with the sensor; setting the analyte concentration in the first fluid to a second concentration with said adjusting means; measuring the second analyte concentration with the sensor; and determining the calibration coefficients for the sensor from the measured first analyte concentration and the measured second analyte concentration. In a third embodiment, the method comprises exposing the sensor to a first fluid comprising a first unknown concentration of the analyte; measuring the first unknown analyte concentration with the sensor; determining the first unknown analyte concentration with an analyser external to the patient monitoring system; providing the sensor with the determined first analyte concentration, and determining the calibration coefficients for the sensor from the measured first unknown analyte concentration and the analyte concentration determined by the analyser. At least some of the above embodiments ensure that the period between recalibrations of the sensor is extended, thus reducing the number of disruptions to the sensor monitoring process.05-26-2011
20110088446PRE-CALIBRATED REPLACEABLE SENSOR MODULE FOR A BREATH ALCOHOL TESTING DEVICE - The present invention describes a replaceable breath alcohol sensor module that can be replaced with a new pre-calibrated breath alcohol sensor module or re-calibrated. The breath alcohol sensor module requiring calibration can be removed from the body of a Breath Alcohol Testing Device (commonly called “breathalyser” or “breathalyzer”). The breath alcohol sensor module can be separately calibrated for accurate calculation of “percent blood alcohol concentration” (% BAC) based on breath air samples and then re-installed into the breath alcohol tester or the old breath alcohol sensor module can be replaced with a new pre-calibrated breath alcohol sensor module. The present invention improves upon and/or replacing the current method of re-calibration at a breathalyzer service center.04-21-2011
20090133465INNOVATIVE GAS MONITORING WITH SPACIAL AND TEMPORAL ANALYSIS - The present invention relates to the monitoring of gas concentrations possible in very low ranges (i.e., low ppb and even ppt ranges) and especially use thereof in environmental monitoring, exposure assessment, bomb detection, and health studies. The invention can use a spatial and temporal assessment of gas concentrations that enables the sources of the gas in question to be located and identified which is useful in environmental and health field but can also be applied to other fields an example of which is detecting and locating explosives. This technology can uses small, light weight, and low power components that allow for the monitor to be portable and even worn on a person as a personal monitor. This technology can be used in a stationary monitors as well.05-28-2009
20120167656Method and Diagnostic Device for Diagnosing a Heatable Exhaust Gas Sensor of an Internal Combustion Engine - A method is described for diagnosing a heatable exhaust gas sensor of an internal combustion engine, in which a predefined chronologically varying or constant voltage or a predefined chronologically varying or constant current is generated with the aid of a voltage source, the voltage or the current is applied to terminals of the exhaust gas sensor, a current or applied voltage, which flows through the voltage source when the voltage or the current is applied, is detected, and the current or the voltage is analyzed to diagnose the exhaust gas sensor. To diagnose the exhaust gas sensor, which permits a reliable and accurate diagnosis of the exhaust gas sensor and allows a statement about the type of a possibly existing error on the exhaust gas sensor, the method is executed independently of a control and/or regulating unit of the internal combustion engine, an operating temperature of the exhaust gas sensor being regulated to a predefined temperature value with the aid of a regulating element, which is separate from the control and/or regulating unit.07-05-2012
20110197649SELF-CALIBRATING GAS SENSOR - A self-calibrating gas sensor comprises a steady current measuring gas line composed of valves, pumps and a current-type electrochemical sensor, and a coulomb analyzing gas line composed of said valves, said pumps, said current-type electrochemical sensor and a sample chamber. The two gas lines can be interchanged between measurement and analysis by controlling valves. The sensor can measure gas concentrations, and self-calibrate its sensitivity without the need of standard gases for external calibration.08-18-2011
20110107813Breath Test Simulator and Method - A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.05-12-2011
20090019913GAS SENSOR TEST AND CALIBRATION SYSTEM - A system for testing and calibrating gas sensors with gas stored in a strip of packets. The strip may be fed into a chamber having a defined volume of air. A packet may be punctured with a mechanism to release one or more gases into the volume of air to result in an air-gas mixture. New air may be moved into the chamber to push the mixture out of the chamber to a sensor for testing and/or calibration. Then another packet may be punctured to release one or more gases into the volume of new air in the chamber for another air-gas mixture. This mixture may be moved out of the chamber, in the same manner as the previous mixture, to another sensor for testing and/or calibration. This procedure may be repeated with additional packets on the strip.01-22-2009
20120227461SIMPLE EQUILIBRIUM DISTRIBUTION SAMPLING DEVICE FOR GC-MS CALIBRATION - A system for providing standard mixtures of volatile and semi-volatile organic compounds for simultaneous CC and MS calibration in a calibration vial, wherein calibration mixtures are prepared by diluting calibration analytes in granular PDMS such that most of the analytes are in the PDMS phase and the sample can then be taken from the analytes in the headspace vapor in the calibration vial, wherein a reliable calibration sample can be taken from the calibration vial because the analytes in the PDMS phase and the headspace vapor are in thermodynamic equilibrium, and wherein the method provides solvent-less sampling, long-time stability, ease of use, is quantifiable, and related to temperature.09-13-2012
20100326165DETECTOR TEST DEVICE - A gas detector test device includes a housing which can receive the detector to be tested, at least in part. A reference gas detector is carried by the housing. The reference detector is in wireless communication with the detector under test. A gas sample can be injected into the housing. Both detectors can respond to the sample and the detector under test can communicate sensitivity indicia to the reference detector for comparison. Visual, or audible indicia can be generated, indicative of the results of the comparison.12-30-2010
20120266646APPARATUS FOR DETECTING PARTICULATE MATTER AND CORRECTION METHOD OF APPARATUS FOR DETECTING PARTICULATE MATTER - An apparatus for detecting particulate and a correction method of the apparatus for detecting particulate matter that detects particulate matter within a gas to be measured are provided. The correction method corrects the individual differences inevitably occurring during the manufacturing process of particulate matter detection sensors. The apparatus for detecting particulate matter includes an applied voltage correction means. The applied voltage correction means applies correction information acquired by the correction method to detection control.10-25-2012
20120266647DEVICE AND METHOD FOR DIAGNOSING AN EXHAUST GAS SENSOR - A device for diagnosing an exhaust gas sensor, in particular a linear oxygen probe, for an internal combustion engine. A diagnostic unit is configured to control a first and a second current source in a coordinated manner in order to generate a first and a second current. Each of the currents has a predefined polarity sign, and is designed to determine the first and/or second and/or third voltages applied at a first and/or second and/or third terminal when first and second currents flow and put the amounts of the voltages in relation to the coordinated currents such that line interruptions and/or short circuits can be detected at the first and/or second and/or third terminal.10-25-2012
20130199260Detector Cleaner and/or Tester and Method of Using Same - An apparatus for cleaning a detector comprising a housing and a bowl connected to the housing having a detector chamber adapted for enclosing a detector to be cleaned, a contacting surface positioned on the bowl, and one of more air nozzles positioned within the detector chamber for directing one or more bursts of compressed air at a detector to clean the detector, and a fan positioned within the housing operable to draw air within the detector chamber into a filter, and a dust collector for containing dirt and debris dislodged from a detector during the cleaning operation.08-08-2013
20120125076PORTABLE METERED FLOW APPARATUS FOR CALIBRATION/BUMP TESTING - A portable metered flow apparatus for accurately providing calibration gas from a calibration gas source to a gas monitoring instrument in order to permit calibration/bump testing of the instrument comprising a regulator and a gas delivery device that includes a solenoid valve, an electronic timing circuit, means for providing power to the solenoid valve and the electronic timing circuit, a power switch for activating the electronic timing circuit, means for activating the release of calibration gas; and optionally one or more LED lights. A method for calibration/bump testing of a gas monitoring device utilizing the portable metered flow apparatus is also provided.05-24-2012
20120318037Compensated Gas Detectors - A compensated gas detector incorporates first and second pellistors combined with first and second resistors and an intervening switch. Control circuits can close the switch for normal gas detection. The switch can be opened to carry out diagnostic measurements. A compensation coefficient can be established in order to compensate outs from the pellistors due to mechanical damage thereto.12-20-2012
20120279277Measuring Device and Method for Detecting the Hydrocarbon Content in Gases - The invention relates to a measuring device for detecting the hydrocarbon fraction in gases. The measuring device is characterized in that the measuring device determines the hydrocarbon fraction in a first gas flow and a second gas flow, both the first gas flow and the second gas flow originating from the same gas source, the first gas flow being fed to the measuring device unchanged and the second gas flow being fed to the measuring device prepared.11-08-2012
20130008224METHOD FOR CALIBRATION OF A CO2 CONCENTRATION SENSOR AND A MEASURING DEVICE - This publication discloses a method for calibrating a CO2 concentration measuring device, in which method gas concentration is measured in a room. In accordance with the invention presence of persons is continuously determined in the room, and the measurement results are corrected based on the presence information.01-10-2013
20110138874OUTPUT CALIBRATION APPARATUS AND OUTPUT CALIBRATION METHOD FOR NOx SENSOR - An output calibration apparatus for an NOx sensor according to the present invention includes a urea addition valve provided in an exhaust passage in an internal combustion engine to allow urea to be added to inside of the exhaust passage, and an NOx sensor provided at least downstream of the urea addition valve, the NOx sensor being capable of detecting not only an NOx concentration but also an ammonia concentration. The output calibration apparatus executes fuel cut on the internal combustion engine, and calibrates a gain of the NOx sensor based on ammonia obtained from the urea added via the urea addition valve during execution of the fuel cut. The ammonia obtained from the urea added during execution of the fuel cut is used as standard gas to calibrate the gain of the NOx sensor.06-16-2011
20080216553Environmental hazard sensor - An apparatus for sensing a constituent in an environment including a sensor circuit and a suppression circuit. The sensor circuit has a sensor element and an operating state control element. The sensor element senses the constituent by presenting an electrical parameter which varies as a function of a degree of the constituent. The control element maintains the sensor at a preferred operating state. A detected electrical parameter of said sensor element is subject to error resulting from a leakage of electrical current between the control element and the sensor element. The suppression circuit reduces or stops the leakage to reduce the error.09-11-2008
20130111970Compositions for Testing Smoke Detectors - A composition of matter is provided for testing smoke detectors. The composition includes an oligopolymeric siloxane and a fluorinated, propene-based propellant. The composition is non-flammable under all reasonably foreseeable conditions of use. The oligopolymeric siloxane may comprise phenyl trimethicone (INCI) (International Cosmetic Ingredient Dictionary and Handbook), as typified by Dow Corning 556 Cosmetic Grade Fluid, Dow Corning 558 Fluid and equivalent siloxane compounds. The fluorinated propene-based propellant may comprise trans 1,3,3,3-tetrafluoroprop-1-ene. The trans 1,3,3,3-tetrafluoroprop-1-ene may comprise Honeywell Fluorine Products Division's HFO1,2,3,4ze(E) product. The fluorinated propene-based propellant may be present at from about 94% to 99% by weight. The oligopolymeric siloxane may be present at from about 1% by weight to about 6.0% by weight, ideally 1.5% to 2.0% by weight. Up to about 25% by weight of the composition is may comprise a totally non-flammable propellant or diluent, such as 1,1,1,2-tetrafluoro-ethane or cis/trans 1,1,1,4,4,4-hexafluorobut-2-ene or iodotrifluoromethane (CIF3).05-09-2013
20130111969METHODS FOR RETROFITTING NATURAL GAS METERS - Disclosed are methods for diagnosing poor performance of natural gas meter stations which utilize tube bundle flow conditioners upstream of orifice plates and methods for retrofitting the natural gas meter stations to improve accuracy of orifice measurements. Diagnostic methods include making measurements of decibels of sound upstream and downstream of the orifice plate, detecting intermittent sounds from a check valve downstream of the orifice plate, and visually inspecting the internal surface of the meter tube downstream of the orifice plate. Accuracy of orifice measurements is improved by replacing a tube bundle flow conditioner with a one-piece plate flow conditioner.05-09-2013
20080202196Apparatus and Methods For Dilution - Self-calibrating apparatus and methods for dilution of an analyte-containing fluid, and in particular for dilution of analyte concentrations beyond the normal measurement range of a detector, without the requirement for other detectors. The apparatus is preferably a respirator test system for determining respirator mask fit in the presence of high aerosol challenge concentrations.08-28-2008
20130145813Method for Measuring the Concentration of at Least One Gas Component in a Measurement Gas - A method for measuring a concentration of at least one gas component in a measurement gas, wherein light of a light source is guided along a light path through a measuring volume containing the measuring gas to a detector unit, and the concentration of the gas component is determined from the wavelength-dependent absorption of the light detected there. The light path is guided outside of the measuring volume through a substitute gas held in a closed volume. A substitute gas comprising a substitute gas component in a predetermined concentration is used, and the concentration of the substitute gas component is monitored based on the detected wavelength-dependent absorption, and if the decrease in the concentration exceeds a predetermined degree, then an error message is generated.06-13-2013
20130145814FLAME 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 provided06-13-2013
20130145815PM DETECTION APPARATUS - An object of the present invention is to reliably detect clogging in a cover even during a period corresponding to a dead zone of a detection apparatus. A PM sensor includes an element section, an element temperature detection section, a heater, and an element cover. An ECU detects clogging in the element cover based on a difference between an element temperature and an exhaust temperature when the exhaust temperature rises. Furthermore, the ECU detects clogging in the element cover based on temperature rising characteristics of the element section observed when the element section is heated by the heater. Thus, even during the period corresponding to the dead zone of the PM sensor, clogging in the element cover can be reliably detected, thus improving the reliability of the sensor.06-13-2013
20130186169METHOD FOR DETECTING THE TYPE OF LAMBDA PROBES - Methods for detecting the type of lambda probes having at least two electrodes disposed on and/or in a solid electrolyte, of which at least one electrode is separated from a gas mixture by a diffusion barrier, and a pump current Ip being applied to at least one of the electrodes. Either the internal resistance of the lambda probe between the electrodes is determined and the type of probe is inferred on the basis of this resistance, or currents are impressed between the electrodes and the type of probe is inferred based on the voltages or resistance ratios thereby resulting.07-25-2013
20130239647Method and System to Amplify and Measure Breath Analytes - A method of avoiding a contaminant which would skew an analyte result in a breath analysis method and of calibrating subject of the breath analysis includes, immediately before the breath analysis method or the collection of breath for the breath analysis method, administering to the subject a predetermined gas composition. A system for analyzing an analyte in breath of a subject while avoiding a local contaminant which would skew an analyte result and calibrating the subject of so that the result of the analyte analysis will be the same regardless of where the test is performed geographically, includes a source of a predetermined gas composition immediately before the breath analysis method or the collection of gas for the breath analysis method, administering to the subject a predetermined gas mixture.09-19-2013
20130192332SENSOR INTERROGATION - A method of operating a sensor system including at least one sensor for detecting an analyte gas and a control system includes electronically interrogating the sensor to determine the operational status thereof and upon determining that the operational status is non-conforming based upon one or more predetermined thresholds, the control system initiating an automated calibration of the sensor with the analyte gas or a simulant gas.08-01-2013
20130199261METHODS AND SYSTEMS FOR CALIBRATING CHEMICAL SENSORS - Methods and systems for calibrating a chemical sensing system are disclosed. Detection of a substance using a first chemical sensor in a chemical sensing system may be initiated at a first time. The first chemical sensor may output a first sensor value. Detection of the substance using a second chemical sensor in a chemical sensing system may be initiated at a second time that differs from the first time by a delta value. The second chemical sensor may output a second sensor value. The chemical sensing system may be calibrated based on the first and second sensor values at the second time and the first and second sensor values at a current time.08-08-2013
20120085143DEGRADATION DETECTION SYSTEM FOR NOx SENSOR, AND DEGRADATION DETECTION METHOD THEREFOR04-12-2012
20110154881CALIBRATION CARD FOR PHOTOLUMINESCENT OXYGEN SENSORS WITH ZERO POINT MAINTAINED WITH A METAL-AIR BATTERY - A calibration card and method of using the card to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The card includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with the environment whereby the second mass of photoluminescent dye is exposed to an environmental concentration of oxygen.06-30-2011
20130269410Detector Housing - A duct detector housing includes a housing cover and a housing body defining a midline between the center of a detector and a printed circuit board within said body. Gas inlet and outlets are off axis of the midline to allow water that collects in conventional housing to drain from the housing. A maintenance mode button associated with a duct detector housing cover that is secured to a housing body of the housing provides a preselected time period during which removal of the cover is independent of a cover removal alarm. A printed circuit board within the housing has dedicated terminal blocks providing grouped connections with each of the groups segregated from another. An improved duct detector terminal has a hole in the terminal adapted to receive a test meter probe therethrough to provide an electrical contact between the wire.10-17-2013
073100070 Span or zero 7
20130055786METHOD FOR AN OPERATIONAL TEST MEASUREMENT OF A LAMBDA PROBE, AND DEVICE FOR CARRYING OUT METHOD - A method for the operational test measurement of a lambda probe, particularly for the purpose of calibrating and/or determining the status of the lambda probe, wherein pure air is circulated around a probe head of the lambda probe is disclosed. The method has the following steps: —insertion of the lambda probe into a flow receptacle which is separate from an engine construction, in such a manner that an air stream (L) can be circulated around the probe head; generation of an air stream (L) in the flow receptacle; evaluation of probe measurement signals (S), wherein a calibration value is obtained and/or a heating current of the lambda probe is evaluated. A device for carrying out the method, as well as a system, is also disclosed herein.03-07-2013
20090095049METHOD FOR CORRECTING THE OUTPUT SIGNAL OF A LAMBDA PROBE - In a method for correcting the output signal of a broadband lambda probe of an internal combustion engine, the influence of the air humidity on the lambda value determined by the broadband lambda probe is detected and is deducted by means of a compensation model. For this purpose, a measured air humidity is incorporated in the calibration of the broadband lambda probe during an overrun shut-off phase of the internal combustion engine.04-16-2009
20090056409Gasless calibration in metabolic gas analyzers - A method of calibrating a metabolic analyzer incorporating an oxygen analyzer and a NDIR carbon dioxide analyzer in the field that does not require the use of gas cylinders containing gases of known concentration is described. In calibrating the CO03-05-2009
20090113984GAS SENSOR SYSTEM HAVING A ZEROING MECHANISM - A sensing system having a zeroing mechanism incorporating a micropump. The micropump may be connected to a gas conditioner for providing zeroing gas to a sensor downstream. The micropump and sensor may be connected to a processor or computer for pump control and receipt of information from the sensor. Upon zeroing and/or baseline correction of the sensor, the pump may be stopped and a sample gas may be fed into the sensor for detection and analysis. Alternatively, the pump may situated downstream of the sensor to draw conditioned gas through the sensor. A valve may be added having a conditioned gas input connected to the conditioner and having a sample input. The valve may have an output connected to the sensor. When the valve is open to the conditioned gas input, it will be closed to the sample input, and vice versa. The system may be for zeroing and/or calibration.05-07-2009
20080282765Self-calibrating sensor - Embodiments of the present invention relate to a gas sensor comprising a flow channel, a concentration modulator positioned in the flow channel, a gas generator in contact with the flow channel, one or more gas detectors positioned downstream of the concentration modulator and gas generator and a pump.11-20-2008
20120260715GAS ANALYZING SYSTEM - A gas analyzing system that can perform calibration without being influenced by the deterioration of span gas in a span gas supply line. An open-close device control part that receives a calibration start signal issuing an instruction to start zero calibration and span calibration, and controls an open-close device for a span gas flow path. An open-close device for a zero gas flow path, wherein if the open-close device control part receives a new calibration start signal after a predetermined time has passed since previous calibration was performed, before the span calibration is started, for a predetermined time, the open-close device control part controls the open-close device for the span gas flow path so as to open the open-close device for the span gas flow path, and thereby purges span gas that remains in the span gas flow path.10-18-2012
20130269411METHOD FOR CONTINUOUS GAS ANALYSIS - A method for gas analysis can include continuously diverting a portion of drilling fluid into a sample chamber from a drilling fluid stream, creating a bidirectional drilling fluid circulation to liberate gas from the drilling fluid, applying a suction to a gas capturing chamber, and allowing a sample of the liberated fluid to continuously flow through the gas capturing chamber, continuously be filtered, and continuously flow into a gas analyzer. The method can include maintaining the sample chamber in an open configuration or decompressing the gas capturing chamber by closing off one or more sample inlets and sample outlets and exhausting portions of the liberated fluid that do not flow to the gas analyzer. The method can include simultaneously providing analysis data to client devices.10-17-2013

Patent applications in class Gas

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