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Document Title |
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7588726 |
Vapor analysis apparatus and method
A vapor analysis system comprising a vapor analyzer capable of collecting and analyzing a vapor sample for detection of a compound that may be contained within the vapor sample. A controller is...
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7556775 |
Microelectro-mechanical chemical sensor
A microelectro-mechanical chemical sensor includes an active cantilever beam having a chemically selective material layer disposed thereon and at least one, preferably two, resistors with the...
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7479255 |
Gas sensor
A hydrogen sensor 25 has a fitting base plate 29 in which a gas-sensing chamber 34 is formed, a specimen gas intake 35 formed on said fitting base plate 29, opening toward an exit passage...
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7357015 |
Gas concentration sensor, hydrogen purification unit using this and fuel cell system
In order to provide a step capable of reliably detecting a CO concentration in a reformed gas at low cost and a hydrogen purifier capable of fully exerting a function of a CO purifying catalyst, a...
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7329389 |
Sensor device and method for qualitative and quantitative analysis of gas phase substances
New sensors and methods for qualitative and quantitative analysis of multiple gaseous substances simultaneously with both high selectivity and high sensitivity are provided. The new sensors rely on...
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7297549 |
Method of determining measurement bias in an emissions monitoring system
A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a...
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7255836 |
Analytical sensitivity enhancement by catalytic transformation
A device and method for quantifying an impurity in an input gas stream. The device and method employ a catalyst to convert the impurity to a detectable species in an output gas stream, and the...
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7223328 |
Sensors for reducing gas molecules
Provided is a gas molecule sensor, characterized in that the sensing element is a polycrystalline tin oxide film having a thickness less than 1 μm. The sensing element is produced by electrolytic...
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7211222 |
Gas sensor
A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder...
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7189363 |
Gas detector
Of a gas detector 100, a chamber 105 formed between a center cover 150 and a cover 160 is a part of an air flow channel AF. A first shielding plate 165 is provided in the chamber 105. ...
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7112447 |
Hand held gas analyzer
A lightweight and portable analyzer is provided. At least one component of the analyzer is made from a lightweight material, such as ABS. A manifold can have a plate and gas passages ultrasonically...
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7056474 |
Hydrocarbon sensor and collector
A hydrocarbon sensor and collector. An element that is capable of absorbing and releasing hydrocarbons is positioned in the air intake system of a vehicle, upstream from the engine and wholly in...
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7041256 |
Poison resistant combustible gas sensors and method for warning of poisoning
A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner...
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7007542 |
Method of warning of poisoning in poison resistant combustible gas sensors
A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner...
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6960476 |
Method and apparatus for analyzing mixtures of gases
Disclosed herein is a method and apparatus for analyzing, sensing and measuring the concentrations of various gases, including NO x , hydrocarbons, carbon monoxide and oxygen, in a multi-component...
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6916664 |
Flammable vapor sensor
A method and apparatus for sensing a flammable vapor are described herein. Initially, a first thermal conductivity of a vapor at a first temperature and a second thermal conductivity of the vapor...
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6913731 |
Oxygen probe
Intended for application on ducts through which flow a fluid at a high temperature, and particularly at a high pressure, comprising two bodies ( 4 ) and ( 8 ) which axially screw onto each other,...
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6911180 |
Catalytic sensor
A combustible gas sensor includes an active element in electrical connection with a measurement circuit. The measurement circuit includes a thermistor network to compensate for the effect of...
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6866819 |
Sensor for detecting small concentrations of a target matter
A sensor for detecting a target matter includes a chemical sensitive layer that is operable to react when exposed to the target matter and a piezoresistive material coupled to the chemical...
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6849238 |
Measuring sensor for gases
The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the...
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6838287 |
Fluid mixture composition sensor
An improved, affordable, and rapid fluid mixture composition or process monitor based on a thermal microstructure sensor. This is preferably accomplished with a microbridge sensor design that has...
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6827903 |
Inert gas fusion analyzer
A single pass analyzer includes multiple infrared sensors, a catalytic converter, a scrubber and a thermal conductivity cell all coupled in series to provide a single pass (i.e., one sample)...
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6756016 |
Gas sensor
A gas sensor for the detection of gases comprises a housing and an active element disposed within the housing. The active element is surrounded by a porous insulating material having a bulk density...
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6719950 |
Miniaturized exhaust gas sensor
An exhaust gas sensor includes a housing and a sensor element supported by the housing. The sensor element includes a support member having an exhaust side, a reference side, and an aperture...
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6565812 |
Gas sensor and method for producing it
A base is provided with a concave and three leads, and the central lead is bent to the side opposite to the concave, and the other leads are bent to the side of the concave. A central electrode of...
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6419880 |
Systems and methods for catalyst reactivation
The invention includes systems and methods which allow reactivation of supported noble metal catalysts. The method involves heating the catalyst in the presence of a gaseous hydrocarbon in the...
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6346420 |
Method of analyzing a gas mixture to determine its explosibility and system for implementing a method of this kind
In this method of analyzing a gas mixture containing at least one inflammable gas to determine its explosibility, a resistive heating element ( 15 ) is energized in an analysis enclosure ( 12 )...
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6117393 |
Multilayered gas sensor
A multilayered gas sensor for detecting the presence of gases in air. In particular, sensors are described for sensing hydrocarbons and nitrogen oxides. An additional feature of the invention is to...
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6074882 |
Device determining a concentration of a gas mixture
In order to determine a concentration of a gas mixture, especially a hydrogen concentration of a containment atmosphere of a nuclear power station, a temperature change resulting from a catalytic...
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5918260 |
Gas sensor with multi-level sensitivity circuitry
A combustible gas detector or sensors having a multi-level sensitivity circuitry. The gas detector has a bridge circuit for outputing voltages indicative of gas concentrations contacting the bridge...
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5902556 |
Catalytic gas sensor
A catalytic detector for a flammable gas comprises a substrate and a sensing structure suspended from the substrate. The sensing structure has a combined heating element and temperature sensing...
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5866075 |
Device useful for sensing ammonia and nitrogen oxides(s) gases at room temperature
A device for sensing ammonia (NH 3 ) and nitrogen oxide (NO x ) gases comprising: a sensor for detecting said ammonia and said nitrogen oxide gases, said sensor including a substrate and a layer...
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5858306 |
Modified noble metal catalyst based calorimetric sensor and method
A modified noble metal catalyst based calorimetric sensor for sensing non-methane hydrocarbons in an automotive exhaust gas stream includes a first sensing element (105) with an output that...
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5824271 |
Gas sensor
A substrate carrying a first electrode and a second electrode, the first and second electrodes being disposed adjacent to one another, the first electrode being disposed between the substrate and a...
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5779980 |
Gas sensor having a compounded catalytic structure
A gas sensor for detecting the presence of gases in air. In particular, sensors are described that have a compound catalytic support structure and are suitable for sensing hydrocarbons and nitrogen...
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5736104 |
Transition metal oxide based calorimetric non-methane hydrocarbon sensor and method
A transition metal oxide based calorimetric non-methane hydrocarbon sensor (100) is constructed by disposing a transition metal based catalyst (105), preferably chromium oxide (Cr 2 O 3 ), onto a...
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5730942 |
Apparatus for measuring the content of foreign substances in a gas stream
A system for measuring the content of foreign substances in a gas stream, for example oil in a stream of compressed air. The system includes at least one probe for collecting a given amount of gas....
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5670115 |
Hydrogen sensor
A sensor for hydrogen is disclosed comprising an electrically insulating substrate carrying a thin amorphous film of co-deposited nickel and zirconium and an overlying film of palladium wherein...
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5543113 |
Gas analyzing apparatus
For an exhaust analyzer, the factors causing turbulence and mixing of the sample gas are removed from the sample gas-introducing pipe in order to introduce the sample gas into the analyzer cell...
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5401470 |
Combustible gas sensor
A matched catalytically inactive compensator for use in a combustible gas sensor is made from a catalytically active detector. The catalytically active detector is exposed to a gas phase catalytic...
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5379630 |
Thermal conductivity detector
In one embodiment, a thermal conductivity detector in a gas chromatograph is provided with a sensor connected in a resistive bridge with an alternating voltage applied to the bridge. Changes in...
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5297419 |
Linearizing gas analyzer
A machine for analyzing and displaying the concentration of a pressurized gas flowing through a delivery line in relationship to a reference gas. The machine includes a thermal conductivity...
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5265459 |
Single-element thermal conductivity detector
A Wheatstone bridge type thermal conductivity sample gas detector. A sensing element comprising one arm of the bridge is disposed in a constant temperature oven. A variable resistor, which...
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5134080 |
Fluid component detection method
A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a...
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RE33980 |
Thick-film gas-sensitive element
A laminar gas-sensitive thick film consisting of ceramic semiconductor and metallic catalyzer is formed across a pair of electrodes carried by a ceramic substrate, and the nature of metallic...
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5088314 |
Gas detecting method and system
A method of and a system for detecting a gas. A histogram of gas sensor outputs in the past is prepared to determine a gas detection threshold value from the histogram. The threshold value is...
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5087574 |
Fluid component detection method with feedback
A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a...
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5064693 |
Method of adjusting a gas sensor
A method of treating a porous body in a gas concentration sensor to regulate the gas diffusion. The porous body is impregnated with a impregnant containing a component that adheres to or binds with...
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5061447 |
Catalytic combustion type CO gas sensor
A catalytic combustion type CO gas sensor which is composed of an electrical circuit by serially arranging two coils composing an active section and a compensating section, and by providing serial...
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5055269 |
Temperature limited catalytic gas detector apparatus
A temperature limited catalytic gas detector includes a catalytic gas sensor in one branch of a Wheatstone bridge network. A power supply is connected through a voltage controlled regulator to the...
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