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4415876 |
Gas sensor
A gas sensor having a gas sensing element of which electrical resistance changes in accordance with gas components contained in sensing gas and a ceramic member for firmly holding the sensing...
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4414531 |
Partial pressure of oxygen sensor-I
A partial pressure of oxygen sensor which finds utility when inserted into an exhaust system of a hydrocarbon fuel burning device. The oxygen sensor includes a mounting body threaded on one end for...
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4403207 |
Durable titania exhaust gas sensor
A durable automotive exhaust gas oxygen sensor comprises a ceramic sleeve defining a bore and a titania pellet positioned in the bore against a shoulder thereof. Terminal rods and at least one...
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4401967 |
Gas sensor
A gas sensor is disclosed which comprises a sintered metal oxide the resistance value of which changes with the ambient temperature, a gas sensor element having at least one electrode connected to...
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4399424 |
Gas sensor
A semiconductor gas sensor comprises an insulating substrate (11) on which a resistive heater track (15) coupled to a pair of electrodes (12, 14) is deposited. A film (16) of a semiconductive metal...
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4396899 |
Platinum thin film resistance element and production method therefor
A platinum thin film is formed by sputtering platinum onto an insulating substrate and heat aging the platinum thin film in a stairstep manner. A kerf is formed in the platinum thin film to produce...
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4387359 |
Titania oxygen sensor with chrome oxide compensator
An oxygen sensor utilizes a chrome oxide compensating resistor (5) in series with a titania sensing resistor (3). The chrome oxide resistor (5) not only compensates for the effects of temperature...
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4381922 |
Combustion detecting device using metallo-phthalocynine semiconductor and process of preparing same
A device for detecting combustion products and effects resulting from combustion is made by preparing a composition of metallo-phthalocyanine in amorphous or crystaline form selected from the group...
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4378691 |
Multi-functional sensor
A multi-functional sensor capable of sensing the humidity and the concentration of reducing gases in the surrounding atmosphere with a single sensing element of p-type metal-oxide ceramic...
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4377944 |
Integrated gas sensitive unit comprising a gas sensitive semiconductor element and a resistor for gas concentration measurement
For use in a gas sensor, an integrated gas sensitive unit comprises, on a single principal surface, a gas sensitive semiconductor element and a first resistor member connected to the element in...
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4377801 |
Oxygen sensor for detecting the oxygen content of an internal combustion engine exhaust gas system
An oxygen sensor (1) for detecting the oxygen content of an internal combustion engine exhaust gas system includes a generally cylindrical hollow insulator (3) having a first resistive element...
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4359709 |
Combustible gas sensor
A combustible gas detecting element, the sensitive element of which has at least one material selected from the group consisting of gamma-type ferric oxide (γ-Fe 2 O 3 ) and alpha-type ferric...
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4355056 |
Method of manufacturing a combustibles sensor
A method of manufacturing a differential thermocouple combustibles sensor is disclosed which makes the sensor relatively insensitive to sulfur poisoning. To accomplish this the catalytic...
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4351182 |
Oxygen sensor for monitoring exhaust gases
A sensor measuring the partial oxygen pressure in furnace exhaust gas has an active layer of palladium. When the sensor is maintained at a particular temperature, for example about 700° C., the...
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4350660 |
Ammonia gas sensors
An ammonia sensitive element which comprises a body of copper phthalocyanine whose electrical resistance varies with the concentration of ammonia gas to which it is exposed. The body of copper...
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4347732 |
Gas monitoring apparatus
A pair of electrodes are spaced apart on an electrically-insulating support surface. Disposed on the surface in a position bridging the electrodes is a sensor that exhibits a change in conductivity...
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4347495 |
Method of detecting oxygen and an oxygen sensor therefor
An oxygen sensing element has a body of chromium-rich zinc chromite and electrodes in contact with it for sensing the electrical resistance. At elevated temperatures, the resistance varies with...
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4346585 |
Gas detector
A gas detector used with an automobile exhaust gas purifier system is disclosed, in which that part of the gas detector element of a sintered metal oxide which is located between electrodes for...
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4343768 |
Gas detector
A gas detector of the type using an electric heater in which a substrate consists of an upper film of electrically insulating substance having a resistance to heat and a lower film of substance...
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4338281 |
Thin film semiconductor gas sensor having an integrated heating element
A thin film semiconductor gas sensor including a metal oxide semiconductor sensor layer whose electrical resistance changes in dependence upon the nature and concentration of a gas being detected...
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4335369 |
Oxygen sensor
An oxygen sensor in which a porous thick membrane (20) of transition-metal oxide and electrode metal thick membranes (14, 16) are provided on a ceramic base and these membranes are coated with a...
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4333067 |
Ceramic type sensor device
A ceramic sensor device is disclosed which comprises a sensing element of a ceramic material and electric conductors for connection to external circuit which are tightly embedded within a ceramic...
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4332772 |
Portable gas detector
An improvement is provided in a portable gas detector used to detect combustible gases, such as methane, which embodies a Wheatstone bridge circuit including a refractory-coated detector element...
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4328477 |
Gas detecting element and process for producing the same
A gas detecting element including a semiconductor wafer formed of a transition-metal oxide with an electrode layer bonded to both sides of the wafer and a protective layer overlaid on the surface...
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4327054 |
Gas sensor assembly
A gas sensor assembly comprises first and second sinters each composed of a metal oxide having an electric resistance value varying in dependence on the composition of a detected gas as well as the...
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4324761 |
Hydrogen detector
A hydrogen detector comprised of a substrate supporting an electrically conducting base metal film, an upper electrically conducting duffusion barrier metal film, a polycrystalline film of titanium...
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4322968 |
Temperature compensated plug-in type oxygen detector for exhaust gas
A plug-in type oxygen detector for detecting oxygen contained in exhaust gas is disclosed which comprises a series connected, sintered N and P type oxide semiconductors which have temperature...
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4322383 |
Gas component detection apparatus
A gas component detection apparatus comprises a first and a second gas sensing elements each composed of a metal oxide which exhibits variable electric resistances according to gaseous components...
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4314996 |
Oxygen sensor
An oxygen sensor element comprising a substrate made of a compound oxide of the perovskite type and a pair of electrodes electrically connected to the substrate. The compound oxide has a formula...
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4313338 |
Gas sensing device
A gas sensing device comprises a gas sensing element comprising a gas-sensitie resistive film formed of an aggregate of ultrafine particles of a suitable material deposited on the surface of a...
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4313907 |
Apparatus for the detection of a combustible gas
An improvement is provided in apparatus used to detect combustible gases, which embodies a Wheatstone bridge circuit including a refractory-coated detector element having thereon a catalyst for...
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4309897 |
Exhaust gas sensor seal and protection tube arrangement
An improved oxygen sensor of the type adapted for installation in the exhaust conduit of an internal combustion engine. The improved sensor uses a metal oxide element to sense the partial pressure...
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4308518 |
Gas component detector
A gas component detector has a detector element of a metal oxide held on one end of a ceramic body. The detector element is electrically connected to a pair of electrodes and the pair of electrodes...
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4307373 |
Solid state sensor element
A solid state sensor element is a flat device having a film resistance thermometer on one face and a pair of spaced apart conductors on the other. The element is used for measuring selected...
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4303613 |
Gas sensing apparatus
A gas sensing apparatus for sensing the air-fuel ratio in an internal combustion engine has two sinter elements fixed to the tip of a tubular ceramic body and both of the sinter elements are made...
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4296399 |
Microminiature palladium oxide gas detector and method of making same
A microminiature palladium oxide gas detector and its method of manufacture. The detector comprises an extremely small coil of extremely fine wire such as platinum which is retained, sealed and...
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4294801 |
Gas component detector
A gas component detector for detecting a gas component in the exhaust gases includes a detector element of a metal oxide whose electrical resistance value varies suddenly depending on the gas...
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4288774 |
Gas detector
A gas detector including a gas sensitive element that provides an electrical resistance which varies with the type of gas detected and lead wires for conducting the electrical signal from the gas...
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4283703 |
Vibration-resistant probe-like electrical heaters
A probe-like, vibration-resistant fast-heating electrical heater assembly for use in a pollution sensor of an exhaust monitoring system for internal combustion engines, which comprises an elongate...
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4277439 |
Gas component detector
In a gas component detector, a first gas component detecting element is formed by a metal oxide having an electric resistance depending on the concentration of gas components and on the temperature...
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4269804 |
Self-contained gaseous contaminant dosimeter
A personal dosimeter for measuring the average concentration of a gaseous contaminant over a given period of time is provided. The dosimeter comprises a sealed pouch having a reaction chamber,...
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4267023 |
Chemically integrating dosimeter and gas analysis methods
A chemically integrating dosimeter for measuring gases, composed of a dual membrane system and an internal electrolyte solution. The outer membrane is a gas permeation rate controlling membrane....
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4264331 |
Charged non-conductive polar gas sensing element and detection system
An air pollutant and/or fire combustion sensing apparatus includes a charged insulating sensing electrode layer establishing an electric field as the result of electric dipoles and/or electric...
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4260978 |
Gas detector element
A gas detector element comprising a sintered material of a metal oxide, the electric resistivity of which varies depending on an oxidative atmosphere or a reductive atmosphere of the inflammable...
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4259292 |
Gas detecting element
A gas detecting element comprising a hollow cylindrical insulative body, a pair of electrodes provided on the outer periphery of the insulative body, a gas detecting body covering up the outer...
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4250737 |
Battery powered gas level indicator
A gas level indicator incorporates two Taguchi-type sensing elements, one of which is to receive air to be sampled and the other of which is insulated therefrom. A comparator circuit receives the...
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4251225 |
Method of detecting carbon monoxide
Method of detecting carbon monoxide gas at temperatures of 100° C. or less by using a detecting element containing stannic oxide as the main component, which element is prepared by mixing stannic...
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4249156 |
Uncompensated low temperature stoichiometric air/fuel ratio exhaust gas sensor
A titanium oxide resistive-type exhaust gas oxygen sensor having a unique microstructure of interlocked highly irregular, flake-like particles forming a highly durable porous body preferably having...
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4246228 |
Combustible gas detectors
The invention relates to combustible gas detectors of the kink in which a heatable wire filament exhibits a change in resistance due to a change in its temperature caused by the oxidation of a...
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4243631 |
Solid state sensor
A solid state sensor that is ideally well suited for detecting the presence of ozone in an atmosphere under ambient conditions. A metal oxide semiconductor is placed upon a glass substrate by...
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