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5470756 |
Gas sensors
SnO 2 gas sensors are described incorporating Bi 2 O 3 in an amount less than 35% but sufficient to confer hydrogen sensitivity and selectivity to the sensors described comprises 25% by weight...
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5468642 |
Device for monitoring the boron content of borophosphosilicate
A device for monitoring the boron content of the borophosphosilicate, BPSG. The BPSG is obtained by the oxidation of silane, of diborane and of phosphine in a reactor, starting with a first,...
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5441893 |
Method for monitoring the boron content of borophosphosilicate
A method for monitoring the boron content of the borophosphosilicate, BPSG. The BPSG is obtained by the oxidation of silane, of diborane and of phosphine in a reactor, starting with a first,...
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5427740 |
Tin oxide gas sensors
Tin oxide sensors are made by mixing antimony bearing material with tin oxide powder and formation of the sensor by deposition of a slurry of the mixture onto a substrate and drying and sintering...
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5322798 |
Method for carrying out surface plasmon resonance measurement and sensor for use in the method
In a method for carrying out a surface plasmon resonance (SPR) measurement a beam of electromagnetic radiation is directed through a part transparent to it onto a surface of a material layer having...
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5317897 |
Method for detecting the presence of a gas with an opto-electronic gas sensor
Apparatus for detecting the presence of a gas in an ambient atmosphere comprises a multiple quantum well structure; a thin mesh of a transition metal formed on the multiple quantum well structure;...
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5288645 |
Hydrogen evolution analyzer
Method for determining temperature ranges at which a selected gas evolves from a specimen of a selected material, bulk or surface of a metal, semiconductor, or insulator, and the probable source of...
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5279795 |
Extended range chemical sensing apparatus
An apparatus for sensing chemicals over extended range of concentrations. In particular, first and second sensors each having separate, but overlapping ranges for sensing concentrations of hydrogen...
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5271901 |
Device having a diffusion sensor hose for detecting a leak
A device for detecting a medium includes a sensor hose to be laid at a medium to be detected. A material is disposed at least in the vicinity of the sensor hose. The material reacts when in contact...
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5232858 |
Method for quantitative determination of at least one chemical parameter of a sample medium
A method for the quantitative determination of one or more chemical parameters of a sample medium employs a fluorescent agent which is not responsive to the parameter to be determined and which has...
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5110747 |
Diesel particulate monitor
Particulate concentration of diesel exhaust is measured by collecting the diesel particulate on a filter while measuring the amount of exhaust passing through the filter. The filtered particlate is...
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5082789 |
Bismuth molybdate gas sensor
A bismuth molybdate gas sensor which provides stable sensitivity to gases such as alcohol, ketones, alkenes, and long chain alkanes is disclosed. Sensors comprising a mixture of the Bi 2 Mo 3 O...
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5071768 |
Method and apparatus for refrigerant testing in a closed system
A method and apparatus for testing for the presence and concentration of contaminants in a refrigerant. A sample of the refrigerant is withdrawn from a closed refrigeration, air conditioning or...
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5039492 |
Optical pH and gas concentration sensor
An optical pH sensor and a gas sensor utilizing the pH sensor. The pH sensor includes an indicator whose absorbance is a function of the concentration of hydronium ions in a media surrounding the...
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5004585 |
Colorimetric detector tube
The invention relates to a colorimetric detector tube having a porous charge. The charge contains an indicating region provided with an indicator ahead of which a pretreatment region is placed...
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4904604 |
Hydrocarbon mixture analysis
A method and/or system for rapidly determining the average composition and characteristics of a hydrocarbon mixture comprising thermally cracking the mixture to form a gaseous product, measuring...
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4892834 |
Chemical sensor
A sensor for detecting a chemical substance includes an insertion element having a structure which enables insertion of the chemical substance with a resulting change in the bulk electrical...
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4879245 |
Measuring the concentration of two components in a gas blend
A single gas analyzer is used for analyzing the concentration of two gaseous components such as hydrogen and chlorine in a blend by responding to the chlorine content in the gas blend there being a...
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4798704 |
Preheating apparatus employed in analysis of hydrogen and carbon
A preheating apparatus of an analysis apparatus for determining the in quantity hydrogen and carbon contained in a sample such as steel is employed to remove moisture adhered to a sample of the...
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4766081 |
Method for the qualitative and quantitative determination of the hydrogen isotopes, protium, deuterium and tritium, and system for implementing the method
The present invention relates to a method for the qualitative and quantitative measurement, by means of microwave spectrometry, of the hydrogen isotopes, protium, deuterium and tritium, in a sample...
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4718991 |
Proton conductor gas sensor and method of detecting gas using proton conductor gas sensor
A proton conductor gas sensor operable at room temperature for detecting hydrogen or carbon monoxide, and a gas detecting method using the sensor. A pair of electrodes connected to a proton...
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4711854 |
Method of measuring moisture in a burnable absorber
Disclosed is an apparatus for measuring the moisture content of a sample. The apparatus includes a first sealed chamber for accepting the sample and a first impulse furnace within the first chamber...
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4587104 |
Semiconductor oxide gas combustibles sensor
An n-type semiconductor gas detecting element. The semiconductor oxide is bismuth molybdate having the composition Bi 2 O 3 .3MoO 3 and the gas detecting element formed therewith has high...
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4548805 |
Non-invasive test for gastric acid
A non-invasive method for determining gastric acidity in humans, using oral magnesium metal powder while measuring the hydrogen gas response in exhaled breath and belches. The magnesium reacts with...
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4477413 |
Utility conservation in hydrogen recycle processes
A control system is disclosed for modifying the flow of hydrogen in a hydrocarbonaceous apparatus wherein a charge stock and a vaporous hydrocarbon-hydrogen recycle are charged to a reaction zone...
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4476094 |
Apparatus for hydrogen conservation in hydrogen recycle processes
A control system is disclosed for modifying the flow of hydrogen recycle gas to a reaction apparatus which includes the admixture of a hydrocarbon charge stock with a recycle hydrogen-hydrocarbon...
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4411867 |
Reduction gas detector
Apparatus for detecting the concentration of a gas by measuring the amount of mercury vapor generated when the gas is passed through a mercuric oxide bed. The apparatus includes a body having a...
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4401763 |
Analytical method for the determination of nitrogen, carbon, hydrogen and sulfur or chlorine and apparatus therefor
An analytical method for the independent or simultaneous determination of any number of elements selected from the group consisting of nitrogen, carbon, hydrogen and sulfur or chlorine in samples,...
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4396719 |
Method of estimating the insulation life of a resin insulator
Either a monitoring resin piece associated with an electrical appliance or a resin piece forming a part of the insulating components of the electrical appliance is taken out after the electrical...
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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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4293308 |
Method and apparatus for the analysis of sulphur contents in samples
A method and apparatus for the quantitative determination of very small percentages of sulphur in sample analysis is carried out by means of sample combustion in a helium current temporarily...
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4257772 |
Method and apparatus for chemical analysis of specimens
A method and apparatus are disclosed for chemical analysis of specimens in order to detect the presence and percentages of given chemical elements (C, N, H, S and O) therein. Said specimen is...
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4234315 |
Gas chromatographic analysis method and apparatus
A quantitative analysis system is provided wherein a sample is decomposed in a decomposition chamber, the reaction product mixture is passed to a first chromatographic zone wherein a first...
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4204037 |
Method and automated apparatus for detecting coliform organisms
Method and automated apparatus are disclosed for determining the time of detection of metabolically produced hydrogen by coliform bacteria cultured in an electroanalytical cell from the time the...
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4170455 |
Gas monitoring method and apparatus therefor
A method and apparatus for monitoring the concentration of a component of a gas stream. The gas stream to be monitored is heated to a desired temperature and passed through an insulated gas...
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4169708 |
Method and apparatus for gas analysis
A method and apparatus for determination of oxygen or hydrogen levels in a gas sample. In accordance with the method, a flowing stream of a gas sample containing a minor amount of diluent gas,...
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4125374 |
Method and apparatus for determining combustion mixture air/fuel ratio
A wide range combustion mixture air/fuel ratio sensor in which an electrochemical cell supplies hydrogen gas to a palladium sensor element at a rate regulated by the output of a Wheatstone bridge...
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4066404 |
Determination of deuterium concentration in water
Water samples having a predetermined concentration of deuterium are equilibrated with a hydrogen containing reagent at such conditions as to allow migration of hydrogen and deuterium ions between...
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4065373 |
Hydrogen patch cell
A hydrogen patch cell for measuring hydrogen atoms produced in the corrosion of ferrous metals. The cell mounts on the diffusion side of a ferrous wall being penetrated by hydrogen atoms and...
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4054414 |
Gas chromatographic method for the multi-elemental microanalysis of organic materials
Microanalytical method for the simultaneous determination of the elements, carbon, hydrogen, sulfur, chlorine, bromine, iodine and nitrogen in a single, small sample of an organic material, said...
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3955929 |
Gas detecting sensor
Gas detecting sensor made of SnO 2 characterized by containing less than 5% by weight of at least one of Al 2 O 3 , ZnO, SrO and BaO and less than 1% by weight of chlorine. The gas detecting...
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3945797 |
Process and apparatus for measuring the isotope content of substances labelled with .sup.3 H or .sup.3 H and .sup.14 C isotopes
A process for measuring the isotope content of substances containing 3 H or 3 H and 14 C isotopes in the gas phase, by converting the hydrogen content of the sample into water and the carbon...
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3943750 |
Probe collector for subterranean gases
A gas probe for penetrating the earth to sample gasses therefrom such as gases of putrefaction in a suspected burial area. A cylindrical sampling conduit extends from an outlet at the top to a...
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3890100 |
Gas conditioning and analyzing system
A gas conditioning and analyzing system for conditioning and analyzing a sample of gas of any given temperature, composition and moisture content. The system receives a sample of gas from a source...
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3871827 |
Apparatus for determining small amounts of carbon monoxide or hydrogen in atmospheric air
Carbon monoxide and hydrogen are determined in atmospheric air by reaction ith yellow mercuric oxide at elevated temperature and optical determination of the elementary mercury in the air stream...
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3838969 |
ELEMENTAL ANALYSIS OF SULFUR-CONTAINING MATERIALS
An improvement in the elemental analysis of sulfur-containing materials to provide quantative determination of the sulfur content. In a preferred embodiment the elemental analysis of a material to...
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3673854 |
METHOD OF OPERATING GAS ANALYSIS APPARATUS
The time required for continuous gas analyzers of blast furnace top gas and the like to reach steady-state conditions after an interruption of furnace operation is greatly reduced by a process...
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3607084 |
COMBUSTIBLE GAS MEASUREMENT
The measurement of combustible gases comprises passing a stream of gas containing the combustible gases over a conductive metal wire coated with a thin catalytic coating of a mixture of thorium...
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3549327 |
METHOD AND ANALYZER FOR HYDROGEN CARBON MONOXIDE AND HYDROCARBONS IN EXHAUST GASES
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3497449 |
CONTROLLING A CONTINUOUS PROCESS BY CONCENTRATION MEASUREMENTS
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