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5683569 |
Method of sensing a chemical and sensor therefor
A sensor (10) includes a gate electrode (20) overlying a channel region (34). A gap (22) between the gate electrode (20) and the channel region (34) allows a surface (28) of the gate electrode (20)...
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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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5658732 |
Assay method for biological target complexes on the surface of a biosensor
A biosensor detector method for detecting biological targets, using specific binding, or hybridization techniques coupled with enzymatic amplification and the mass sensing capability of a...
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5639672 |
Electrochemical determination of fructosamine
The present invention relates to a method for electrochemically measuring the concentration of fructosamine, or its high alkalinity eneaminol tautomer in a body fluid sample.
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5635136 |
Apparatus for sensing combustible gases employing an oxygen-activated sensing element
A combustible gas sensor having a noble metal sensor element with a surface that is heated above a critical temperature at which the surface is able to dissociate oxygen in a gas stream and adsorb...
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5629212 |
Chloride monitoring apparatus
A chloride analyzer includes an inlet valve and filters for process water to be analyzed, as well as a pH electrode to verify the pH value of the incoming liquid before further treatment. A...
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5622868 |
Analytical apparatus utilizing a colorimetric or other optically detectable effect
Analytical apparatus includes a pyroelectric or other thermo-electric transducer element (10) in strip form. Thin film electrodes (12,14) are provided and one or more dots of reagent (16) are...
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5569591 |
Analytical or monitoring apparatus and method
Cellular biological material (such as living tissue) is analysed or monitored by applying an AC electrical potential across the biological material so as to produce a nonlinear dielectric spectrum,...
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H001562 |
Heat sensitive liquid chemical agent and pesticide detector and method of using
The device of this invention is used to detect small quantities of liquid emical agents in certain pesticides on the basis of the heat reaction between the liquid agent and a chemical oxidant such...
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5527711 |
Method and reagents for binding chemical analytes to a substrate surface, and related analytical devices and diagnostic techniques
A method is provided for detecting an analyte of interest in a sample. The method involves binding the analyte to the surface of a substrate through a biotin-biotin binding protein interaction,...
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5526280 |
Method and system for gas detection
A system and method for using a gas detecting device that conducts electricity increasingly for increasing concentration of a gas being detected. The temperature of a gas sensor element is...
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5521099 |
Method and apparatus for sensing combustible gases employing and oxygen-activated sensing element
A combustible gas sensor having a noble metal sensor element with a surface that is heated above a critical temperature at which the surface is able to dissociate oxygen in a gas stream and adsorb...
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5521098 |
Thermionic ionization detector with flow-through thermionic source
Method and apparatus for the thermionic ionization detection of one or more particular constituent components of a sample that is present in a fluid mixture. The fluid mixture flows across the...
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5518933 |
Method of analyzing washings for free acids and ions
A method of determining the concentrations of at least two of plural kinds of known free acids and ions contained in a solution, wherein these known free acids and ions are known beforehand to be...
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5498548 |
Thermionic ionization detector with radiant heater assembly
Method and apparatus for the thermionic ionization detection of one or more particular constituent components of a sample that is present in a fluid mixture flow provided to a thermionic source....
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5482678 |
Organic chemical sensor
In this invention, a first sensor senses an organic gas, liquid or vapor and includes a first support having a first support surface with a layer of material fastened to it. In the presence of...
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5480808 |
Voltammetric method for measuring peroxide concentration in hydrocarbon fuels
A method for the analysis of peroxide in hydrocarbon fuels such as jet fuels, diesel fuel, kerosene and gasoline is disclosed which can be performed both at remote locations as well as in a...
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5466605 |
Method for detection of chemical components
A chemical switch device and method of sensing the presence of a chemical constituent in an ambient environment, the chemical switch device comprising a film which irreversibly reacts upon exposure...
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5439800 |
Offshore petroleum exploration system
A system is provided for locating and delineating sea floor occurrences of petroleum seepage, achieved by apparatus for the detection of the resulting abnormal distribution of electrical potential...
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5424214 |
Diluent and method for determination of total calcium
Diluents and methodologies for determining the concentration of total calcium in a clinical sample (e.g. whole blood, sera plasma urine cerebro spinal fluid) containing protein-bound calcium are...
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5403748 |
Detection of reactive gases
A method of detecting the presence or measuring the concentration, of a reactive gas in an inert ambient gas by (i) placing a silicon dioxide film derived from the oxidation of a hydrogen...
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5385846 |
Biosensor and method for hematocrit determination
A biosensor and method for determining the hematocrit level of a whole blood sample using electrochemistry. The biosensor includes working and counter electrodes. A porous membrane is impregnated...
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5378342 |
Neural modeling device
A neural modeling device comprising an electrolyte, a lipid or lipid-impregnated membrane which is situated in the electrolyte and in which an ion pump and an ion channel are buried, and an...
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5324665 |
On-line method for monitoring chloride levels in a fluid stream
A method for monitoring automatically, on-line chloride content in a fluid stream in an oil refinery. Additionally, the present invention provides a method for neutralizing the acids resulting from...
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5310507 |
Method of making a 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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5306644 |
Mass sensor method for measuring analytes in a sample
A system for accurate and precise measurements of analyte(s) in a system. The measurement system comprises piezoelectric surface wave sample devices, at least one piezoelectric surface wave...
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5300442 |
Method and device for measuring chlorine concentrations with enhanced sensitivity
A method and apparatus for measuring the amount of residual chlorine in solution with enhanced accuracy. The basic measurement technique involves introducing a solution of iodide ion into the...
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5283037 |
Chemical sensor utilizing a surface transverse wave device
A sensor suitable for use as a viscosity sensor, a chemically selective sensor, or a chemically specific sensor. The sensor is a surface transverse wave (STW) or Love Wave device that, for solute...
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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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5256574 |
Method for selective detection of liquid phase hydrocarbons
A method for the selective detection of liquid phase hydrocarbons in the C 6 -C 16 range includes a matrix comprising a silicone polymer having dispersed therein a conductive carbon black filler...
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5250439 |
Use of conductive sensors in diagnostic assays
A conductive sensor and its use in a diagnostic assay are disclosed. The miniaturized conductive sensor, utilizing a conducting polymer, is used in a diagnostic device to determine the presence or...
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5244812 |
Detection of electron acceptor gases using sulfur-selenium fulvalenes
NO 2 and other electron acceptor gases can be detected at 5 volume parts per million by tetrathiafulvalene TTF. The TTF may be incorporated in a polystyrene film, which changes its infra-red...
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5242831 |
Method for evaluating roughness on silicon substrate surface
A method for evaluating surface micro roughness of a silicon substrate includes the steps of soaking the silicon substrate in a mixture of hydrochloric acid of 30 to 40 vol %, hydrogen peroxide...
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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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5208162 |
Method and apparatus for monitoring corrosion
A method and apparatus for using a coated piezoelectric crystal to monitor and report corrosion in terms recognized as conforming to an industry standard is disclosed. The present invention...
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5194372 |
Method and apparatus for detecting disorders in genomic substances
Disorders of the base sequences in genomic substances such as DNA and RNA are detected by changing the state of aggregation of fine particles by cleavaging using a nuclease. A single-stranded...
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5190041 |
System for monitoring and controlling blood glucose
Systems are disclosed which utilize implanted glucose sensitive living cells to monitor blood glucose levels. The implanted cells produce a detectable electrical or optical signal in response to...
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5120505 |
Chemical sensors
Sensors responsive to small changes in the concentration of chemical species are disclosed, comprising a mechanicochemically responsive polymeric film capable of expansion or contraction in...
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5118628 |
Method for analyzing water and apparatus to carry out this method
A method for analyzing water or other liquid, in particular rain water, comprises the steps of providing a collector comprising at least first and second volumetric cells and a mechanism for...
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5108576 |
Pyroelectric thermometric device
A device for detecting the presence of a predetermined reactant in a fluid suspected of containing the same which comprises a pyroelectric film having a first and a second surface, a first...
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5106756 |
Method and system for gathering a library of response patterns for sensor arrays
A method of gathering a library of response patterns for one or more sensor arrays used in the detection and identification of chemical components in a fluid includes the steps of feeding samples...
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5098848 |
Method and apparatus for measuring the air content of water-soluble oxidizers
Air containing water-soluble oxidizing agents, usually predominantly hydrogen peroxide, is exposed in concurrent flow to water that may be acidified if the air contains interfering acidic reducing...
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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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5071770 |
Method for gaseous component indentification with #3 polymeric film
A sensor having an interdigitated gate electrode field effect transistor (IGEFET) coupled to an electron beam evaporated copper phthalocyanine thin film is used to selectively detect...
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5068196 |
Method for determining fluid corrosiveness
There is disclosed a portable apparatus and process for using same including a test conduit assembly and related conduit valve and fluid flow assemblies for conecting to a process unit for fluid...
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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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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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5034192 |
Molecule-based microelectronic devices
Several types of new microelectronic devices including diodes, transistors, sensors, surface energy storage elements, and light-emitting devices are disclosed. The properties of these devices can...
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5004583 |
Universal sensor cartridge for use with a universal analyzer for sensing components in a multicomponent fluid
The apparatus employs a method for accurate, reproducible analytical solution evaluation eliminating the need for a reference sensor by determining the activity of selected species employing...
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