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5298783 |
Combined semiconductor gas sensor
The present invention relates to a combined semiconductor gas sensor, this sensor is constituted by combining two portions, each of the portions is made of a different gas sensitive material, their...
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5296836 |
Gas component detecting element and detector
A gas component detecting element using particles of metal oxide. The particles are prepared and calcined, and then subjected to a treatment which enlarges a specific surface area thereof. Catalyst...
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5279855 |
Manufacture of inert, catalytic or gas-sensitive ceramic layers for gas sensors
The invention concerns a process for manufacturing inert, catalytic or gas-sensitve ceramic layers for gas sensors which comprises coating an uncoated insulative substrate with a layer of paste...
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5250170 |
Gas sensor having metal-oxide semiconductor layer
A gas sensor includes a substrate, a heater member formed on the base member, a gas sensitive structure formed on the heater member by a process comprising the following steps of forming a stacked...
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5226309 |
Halogenated compounds sensor
A highly sensitive and selective sensor for the detection of halogenated compounds comprises a bead of sodium lanthanum fluoride silicate, having the molecular formula NaLa 4 (SiO 4 ) 3 F, in...
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5211053 |
Hot gas sensor device with improved thermal isolation from carrier plate
A gas sensor device has a carrier plate of ceramic or glass. The carrier has apertures which leave only strips in a spiral configuration connecting a middle region of the carrier to the outer...
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5160598 |
Oxygen sensor for air-fuel ratio control having a protective layer including an oxygen storage material
Oxygen sensor for air-fuel ratio control is provided with a sensor element having an oxygen ion-conductive main body and electrodes on both sides thereof, and at least one porous protective layer...
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5145645 |
Conductive polymer selective species sensor
A selective chemical species detector including a conductive polymer based sensing element having a detectable characteristic, for example, the polymer resistivity, permanently altered on exposure...
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5142266 |
NTC temperature sensor and process for producing NTC temperature sensing elements
The NTC temperature sensor includes a NTC temperature sensing element having an NTC resistor and made of a laminated composite of ceramic films, which is so designed that the ambient air or oxygen...
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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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5131990 |
Fluoropolymer humidity sensors
A humidity sensor composed of interdigitated electrodes and a material therebetween which is composed of Nafion wherein H+ cites have undergone ion exchange with at least one of NH4+ and Li+, Na+,...
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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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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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5086286 |
Gas-sensitive device
A thin film gas-sensitive device includes an insulating substrate having a pair of electrodes, a gas-sensitive layer having a gas sensitive substance deposited on the insulating substrate and...
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5071626 |
Oxygen sensor
The sensor includes a sensing element of a copper oxide ceramic with perovskite related structures. Electrical circuitry responsive to the conductivity of the sensing element is provided. This...
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5070318 |
Exhaust gas sensor and process for producing same
An exhaust gas sensor containing BaSnO 3 or the like and a process for producing the sensor. The BaSnO 3 is made free of segregation and adapted to have acid-base strength of at least 6.8 as...
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5057436 |
Method and apparatus for detecting toxic gases
Apparatus for detecting the level of ammonia in air comprises a conduit through which air is flowed as an airstream past two ammonia sensors that straddle an ammonia absorber. The apparatus also...
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5051718 |
Thermistor element and gas sensor using the same
A thermistor element composed substantially of a vanadium-containing titania having dissolved therein 0.01 to 10 at. %, based on titanium, of vanadium and optionally 10 at. % or less, based on...
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5047214 |
Smell sensing element and smell sensing device
A smell sensing element and a smell sensing device utilizing the element. The smell sensing element has a semiconductor portion formed mainly of SnO 2 . The semiconductor portion has a first...
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5036704 |
Moisture sensor
A moisture sensor (100) is provided that utilizes a sulfonated fluorocarbon film (10) having a thickness of less than about one micron and capable of providing accurate measurements of humidity and...
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5037761 |
Method of applying an automotive type oxygen sensor for use in an industrial process analyzer
An industrial process oxygen analyzer, and method of using same, incorporates an automotive oxygen sensor to minimize the criticalness of controlling heater temperature during operation. Higher...
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5019885 |
Gas detecting device
A gas detecting device includes a substrate and a plurality of gas sensitive elements supported by the substrate. A plurality of predetermined temperatures at which gases are detected are provided....
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5017340 |
Temperature compensated resistive type sensor for the measurement of relative concentrations of fluid reactive species
Disclosed is an oxygen sensor of the resistive type for the measurement of relative fluid concentrations of fluid reactive species. The following are disposed on one and the same substrate: a...
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5015616 |
Composition for catalytically cleaning exhaust gas and to improve the sensitivity of sensors
This invention provides a composition comprising a mixture or a fired product of a material of the general formula Sr (1+x)/2 La (1-x)/2 Co 1 -x Me x O 3 -δ (wherein Me: at least one of Fe, Mn,...
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5010021 |
Method for restoring the sensing capacity of an electrical sensor
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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5006828 |
Exhaust gas sensor and process for producing same
A BaSnO 3 exhaust gas sensor and a process for producing the same. Surface reformation of sensor electrodes is done for preventing the deterioration of the sensor response and the corrosion of the...
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5004700 |
Humidity sensor
A method of making a humidity sensor comprises providing a host device constituted by a semi-conductor substrate (10) and a gate insulator (13) of an insulated gate field effect transistor, forming...
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4992244 |
Films of dithiolene complexes in gas-detecting microsensors
Chemical microsensors are fabricated by applying dithiolene transition metal complexes as thin films to chemiresistor devices using the Langmuir-Blodgett technique. The thin films interact with...
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4988970 |
Semiconductor for a resistive gas sensor having a high response speed
Semiconductors for resistive gas sensors or resistive semiconductor gas sensors with high speed of reaction are disclosed. These semiconductors are appropriate to measure the partial pressure of...
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4984446 |
Gas detecting device and gas detecting system using the same
A gas detecting device includes a substrate, an insulating layer supported by the substrate, first and second pairs of detection leads formed on the insulating layer, a heater lead formed on the...
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4983360 |
Gallium nitride and oxynitrides used as selective detectors of reducing gases, process of making and device containing them
The present invention relates, a compound for use with selective detectors of the semiconductor resistance type which detect for nitrogenous reducing gases in the atmosphere, especially ammonia and...
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4961064 |
Oil leakage sensor
An oil-leakage sensor formed from a porous water-repellent resin admixed with fine electrically conductive carbon particles coated with a water-repelling layer.
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4958514 |
Gas sensing element
A gas sensing element, such as may be used to sense the presence of oxygen contained in the exhaust from a burner or internal combustion engine, whereby, by preventing the re-sintering of...
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4952903 |
Ceramic heater having portions connecting heat-generating portion and lead portions
A ceramic heater including a ceramic body and a heater element formed on the ceramic body. The heater element has a heat-generating portion formed of a cermet containing a ceramic material and a...
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4938928 |
Gas sensor
A sensor comprising a metal heat generating member formed with a heat-resistant insulating coating of Al 2 O 3 or the like over its surface, and an atmosphere-sensitive layer of SnO 2 or the...
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4928513 |
Sensor
A sensor having a pair of sensor units, one of which is a detecting sensor unit and the other of which is a reference sensor unit, wherein each of the units comprises a substrate with a hollow...
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4916935 |
Low power solid state gas sensor with linear output and method of making the same
The present invention is directed towards a low power, solid state gas sensor and method of making the same. The sensor comprises a heating element formed from a wire coiled about an axis, a...
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4915816 |
Polymer hygrometer for harsh environments
The polymer hygrometer with lithium doped Nafion was developed to meet the need for a reliable sensor for determining the relative humidity in harsh environments of pulp and paper mills. The sensor...
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4911892 |
Apparatus for simultaneous detection of target gases
A gas sensing thick film is positioned on an insulating substrate in contact with a pair of electrodes. A non-porous glass layer surrounds the film to stabilize it on the substrate. A heating...
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4906440 |
Sensor for detecting chemicals
A sensor for a gas detector is provided that detects the presences of the gas when the gas reacts with a distributed Rc notch network to cause a shift in operating frequency and notch depth. A...
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4900405 |
Surface type microelectronic gas and vapor sensor
The present invention is concerned with electrode structures and microsensors having fast response times and high sensitivity and to methods using such structures and/or microsensors. This is...
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4897628 |
Gas sensor and method of manufacturing the same
A gas sensor using an n-type metal oxide semiconductor and a method for manufacturing such a gas sensor is provided. More particularly, a gas sensor for detecting an inflammable gas and a method...
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4892709 |
Microdevice for gas and vapor sensing
In accordance with the present invention a microdevice 10 is set forth for gas sensing. The microdevice 10 includes a conductive substrate 12 having an insulator layer 14 on a surface 16 thereof,...
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4893108 |
Halogen detection with solid state sensor
A solid state thin film detection and measurement apparatus for halogen gas components such as chlorine in a gas mixture is described. The detection cell employs plural response modes to the...
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4883947 |
Resistance ceramic heater with mutually connected heat-generating conductors, and electrochemical element or oxygen analyzer using such ceramic heater
A resistance ceramic heater including a ceramic substrate, and a heating element which has a resistance heat-generating portion, and electrical leads connected to the heat-generating portion for...
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4883643 |
Oxygen sensor protected against contaminants
An electrolytic oxygen sensor in which the atmosphere is admitted to one side of the solid electrolyte through an air-permeable spacer through a dual concentric tube structure. Holes are formed in...
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4864462 |
Capacitive gas detector having a solid rare earth fluoride dielectric
Gas species are detected with a capacitor having a solid, ionic dielectric excited by an AC voltage in the ramp from 0.01-30 Hz, with an amplitude of 1-100 millivolts to allow physisorption...
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4862066 |
Oil leakage sensor element
An oil leakage sensor element is provided wherein a plurality of electrical conductors are contained within and separated from each other by a continuously porous polytetrafluoroethylene (PTFE)...
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4857275 |
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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4855706 |
Organic liquid detector
An electrical sensor and sensor material for detecting the presence of an organic liquid by contact that is not sensitive to the presence of organic vapors from the liquid. The sensor material...
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