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5876673 |
High sensitivity phase transformation-based oxygen sensors for proportional control
The invention is a sensing method and an oxygen sensor for detecting a change of oxygen partial pressure in an ambient atmosphere through a change of a measurable physical property of a sensing...
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5864148 |
High-temperature gas sensor
A high-temperature gas sensor for the detection of the heat tone of combustible gases includes a semiconducting ceramic layer with thermistor properties. The semiconducting ceramic layer is formed...
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5859361 |
Air fuel ratio sensor and a method for making the same
An air fuel ratio sensor has a sensor element having a sensing portion and a flange portion in contact with a tapered portion of an accommodation hole of a housing. The sensor element is hot...
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5844122 |
Sensor with output correcting function
A sensor has a voltage output circuit and a potentiometric resistor for dividing the voltage of the voltage output circuit. The resistance of the potentiometric resistor is regulated by trimming in...
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5840255 |
Gas sensor
In order to avoid measurement signal drift, a gas sensor has a gas sensitive layer which is provided on its upper side with a measuring electrode structure and on its lower side with an...
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5841021 |
Solid state gas sensor and filter assembly
An electrochemical gas sensor is provided, the use of which permits quantitative measurement of volatile gas contaminants in an atmosphere being monitored, generally at ambient temperatures below...
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5837886 |
Gas sensor
A film heater and thick-film electrode pads are provided on one main surface of a heat-resistant insulating substrate and are connected by through holes to a metal oxide semiconductor film on the...
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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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5821401 |
Gas sensor
A gas sensor includes a one-piece housing sleeve having a length dimension; an exhaust gas-side end and an opposite, exhaust gas-remote end, an inner space, an external thread, a terminal length...
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5792666 |
Oxygen sensor based on non-doped cuprate
Cuprate mixed oxides having the general formula Ln 2 CuO 4 +y, in which Ln stands for at least lanthanum or a trivalent element from the group of rare earths with atomic numbers from 58 to 71, and...
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5786608 |
Semiconductor chemical sensor device with specific heater structure
A semiconductor device (50) comprises a semiconductor base, a heater (20) formed over the semiconductor base from conductive material, such as polysilicon, and a layer (22) for heating by the...
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5777207 |
Gas sensor and method for fabricating the same
Air pollution gas sensor which efficiently detects smell from smoking, ordinary stinks such as TMA and CH3SH, smell of Kimchi, acetaldehyde, and etc. and also a method for fabricating the same is...
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5777206 |
Method and measuring device for determining the water content of a gas
The invention concerns a method and measuring device for determining the water content of a gas. The measuring device comprises a measuring sensor arrangement which consists of: a capacitive sensor...
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5734091 |
Method of manufacturing nitrogen oxide sensor, and nitrogen oxide sensor manufactured by the method and material therefor
A method of manufacturing a nitrogen oxide sensor for detecting a nitrogen oxide to be used in the field of e.g. reducing or decomposing nitrogen oxides, as well as such sensor and material...
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5698771 |
Varying potential silicon carbide gas sensor
A hydrocarbon gas detection device operates by dissociating or electro-chemically oxidizing hydrocarbons adsorbed to a silicon carbide detection layer. Dissociation or oxidation are driven by a...
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5674752 |
Conductive polymer coated fabrics for chemical sensing
A fabric chemical sensor, a process and an apparatus is disclosed. The sensor, process and apparatus are for the detection, classification, identification and/or quantitation of one or more...
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5668301 |
Method and apparatus for the detection of hydrogen using a metal alloy
A hydrogen sensitive metal alloy contains palladium and titanium to provide a larger change in electrical resistance when exposed to the presence of hydrogen. The alloy is deposited on a substrate...
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5652443 |
Sensor having a micro-bridge heater
A sensor including a micro-bridge heater which is located above a depression in the surface of a substrate. The heater includes a first insulating film on the substrate, a conductive film on the...
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5627305 |
Gas sensing apparatus and method
A gas sensing apparatus is disclosed including a gas sensing device that is self-heated due to an applied voltage, whose resistance variation amount is varied to thereby sense gas; a voltage supply...
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5624640 |
Sensor for detecting nitrogen oxide
A sensor is proposed for detecting nitrogen oxides (NO, NO 2 , N 2 O 4 ) in a test gas, having a semiconducting metal oxide layer (3) which is deposited on a ceramic substrate (10) and whose...
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5616825 |
Exhaust sensor including a ceramic tube in metal tube package
The invention includes a sealing system for a heated flat plate exhaust gas sensor having a plurality of alternating layers of glass and steatite surrounding a flat plate sensing element. A ceramic...
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5605612 |
Gas sensor and manufacturing method of the same
A thin-film gas sensor and manufacturing method of the same is disclosed which includes a silicon substrate; an insulating layer formed on the surface of the silicon substrate; a heater formed in...
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5600296 |
Thermistor having temperature detecting sections of substantially the same composition and dimensions for detecting subtantially identical temperature ranges
A thermistor type temperature sensor having a substrate made from an electrically insulating ceramic plate. A thin or thick film detecting resistor is printed on the substratum. A thick or thin...
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5594162 |
Valve stem gas leak detector
A valve stem gas leak sensor or detector configured to surround a possibly leaking petrochemical or like flow line valve stem and provide for external monitoring equipment an electrical resistance...
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5591321 |
Detection of fluids with metal-insulator-semiconductor sensors
A metal-insulator-semiconductor diode sensor having a Pt/Ir alloy and/or a Pt/Sn alloy electrode is sensitive to and can detect ethylene. An array of metal-insulator-semiconductor diode sensors...
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5587130 |
Selected area adhesion and surface passivation of metal films
A thin film device having a selectively passivated surface is provided. An embodiment of the device is particularly suited to detection of chemical constituents by selective adsorption, where the...
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5576922 |
Surge absorbing structure, surge absorbing element, connector and circuit device using these structure and element
A surge absorbing structure capable of effectively utilizing the gaseous discharge is intended without a complicated structural configuration such as using the conventional discharge tube. To...
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5561411 |
Temperature sensor for high temperature and method of producing the same
According to the present invention, a temperature sensor for high temperature comprises a ceramic plate on the surface of which is provided a thermistor layer, electrodes connected to the...
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5549871 |
Sensor for combustible gases
A combustible gas sensor comprises four glass insulated radially extended and symmetrical temperature sensitive elements which are coated with a porous ceramic but only two elements having a...
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5548268 |
Fine-line thick film resistors and resistor networks and method of making same
Electrical resistors and resistor networks are provided on an insulative substrate with designated conductive terminations by direct and continuous writing of resistive lines in fine-line patterns...
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5533393 |
Determination of dew point or absolute humidity
A microsensor system for determining water vapor content of the ambient atmosphere that uses a thin film suspended ceramic diaphragm structure featuring an embedded, patterned thin film heater,...
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5517182 |
Method for CO detection and its apparatus
A CO detector, utilizing periodical temperature change of a metal oxide semi-conductor gas sensor, is equipped with a backup battery. When power cut of a commercial power supply is detected, the...
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5476003 |
Measuring sensor for determining gas compositions
A measuring sensor for determining gas compositions, includes a substrate consisting essentially of Al 2 O 3 , electrodes disposed on the substrate, a sensor layer consisting essentially of TiO 2 ...
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5473304 |
Method of protecting catalytic converters for exhaust gas purification and heat tone sensor for implementing the method
A method is disclosed for the protection of catalytic converters for exhaust gas purification by measuring the temperature with a heat tone sensor suitable particularly for the implementation of...
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5467636 |
Flat plate sensor with a robust package design
The invention includes a flat plate exhaust sensor including a flat plate sensing element which is carried by a first ceramic insulator having at its upper end an upwardly extending annular ring....
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5451748 |
Ceramic heater for oxygen sensor of the type having oxygen ion conductive tube of solid electrolyte
In an oxygen sensor of the type having an oxygen ion conductive tube of solid electrolyte, a ceramic heater disposed within the oxygen ion conductive tube for heating the same is in the form of a...
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5451920 |
Thick film hydrogen sensor
A thick film hydrogen sensor element includes an essentially inert, electrically-insulating substrate having deposited thereon a thick film metallization forming at least two resistors. The...
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5448906 |
Ambient temperature gas sensor
An ambient temperature solid state sensor for detecting the concentration of a gas includes an insulating substrate, a polycrystalline semiconducting oxide thin film deposited on the substrate such...
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5434551 |
Gas sensor having its heater and sensing layer on opposite sides of its substrate
A gas sensor that has its heater and sensing layer on opposite sides of the substrate. The gas sensor includes a buffer layer separating the gas-sensing layer from the substrate to improve...
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5397442 |
Sensor and method for accurately measuring concentrations of oxide compounds in gas mixtures
Sensors (10, 40) accurately measure the concentration of an oxide compound, such as nitrogen oxide NO x , in a gas mixture (11) which can include oxygen O 2 . The sensors (10, 40) each comprise a...
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5397541 |
Thin film oxygen sensor
An oxygen sensor is based on a thin film of a compound oxide supported on a substrate such as quartz. The compound oxide has a general formula ABO 2 .5+x, where A is an element of the lanthanum...
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5394735 |
Gas sensor
A gas sensor having a large operation current and being operated at a relatively low temperature includes a substrate having a first surface and a second surface. A sensing area is provided on the...
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5382341 |
Method of making smoke detector
This invention relates to solid-state smoke detectors and smoke (fire) alarm systems, and more particularly to a novel and improved smoke-sensitive element comprising a bismuth oxide film deposited...
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5372785 |
Solid-state multi-stage gas detector
A solid-state, multi-stage gas detector for detecting a selected gaseous species from a plurality of gaseous species. The multi-stage gas detector includes a first conductive layer, exposable to...
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5367283 |
Thin film hydrogen sensor
A hydrogen sensor element comprises an essentially inert, electrically-insulating substrate having a thin-film metallization deposited thereon which forms at least two resistors on the substrate....
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5351029 |
Sensor for determining carbon monoxide
The invention relates to a sensor for the determination of carbon monoxide, especially in gas mixtures containing oxygen, on the basis of doped metal oxides whose electric conductivity is a...
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5345213 |
Temperature-controlled, micromachined arrays for chemical sensor fabrication and operation
Planar forms of chemically-sensitive materials have been combined, under temperature control, with the pixels of a specially-designed micro-hotplate array to produce a miniature device capable of...
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5334350 |
Resistance probe for determining gas compositions and method of producing it
A resistance probe is proposed for detecting gas compositions, particularly in the exhaust gases of internal combustion engines. This resistance probe has the advantage over prior art resistance...
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5304976 |
Contact combustion type carbon monoxide sensor
A contact combustion type carbon monoxide sensor having no sensitivity to H 2 , C 2 H 5 OH and other gases but having a CO sensitivity of 25 to 50 mV at a bridge voltage of 6 to 12 V and a...
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5302935 |
Renewable gas sensor, renewable gas sensor base and method for renewing a gas sensor
A renewable gas sensor, renewable gas sensor base and a method for renewing a gas sensor. The renewable gas sensor has a substantially planar heater. A substantially planar separator is...
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