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7616888 |
Method and system for measuring optical properties of a medium using digital communication processing techniques
A system for measuring properties of a medium includes an electromagnetic generator for forming a CW carrier, a digital encoder for forming a digital message, and a modulator for modulating the CW...
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7601959 |
Thin type vacuum chamber device
The present invention is to provide a thin type vacuum chamber device, wherein two hollow slabs are fastened by a claw fastener to form a thin type simple structure that can maintain a high vacuum...
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7598494 |
Automated FTIR gas analyzer
A system for certifying a concentration of gas in a cylinder includes a gas cell configured to receive a sample gas from a cylinder, and an FTIR module coupled to the gas cell for scanning the...
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7586094 |
Background compensation by multiple-peak measurements for absorption spectroscopy-based gas sensing
Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for...
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7582873 |
Method and apparatus for detecting the type of anesthetic gas
Disclosed is a method and apparatus for detecting the type of anesthetic gas. The method comprises the steps of: generating a light with a plurality of wavelengths, the light being able to be...
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7569821 |
Biological information measuring apparatus
A light emission section spread-spectrum modulates a base band signal at a chip frequency f to thereby generate a primary modulated signal, modulates the primary modulated signal at a frequency 2f...
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7564033 |
Microstructured sensor
The invention relates to a microstructured sensor, having at least one measurement chip in which there is formed a first measurement area having a first measurement structure and a second...
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7541587 |
Gas sensor
A gas sensor comprises a cavity for containing a gas, means for generating radiation which is transmitted through the cavity and includes one or more wavelengths which is absorbed in use by a gas...
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7541586 |
Compact near-IR and mid-IR cavity ring down spectroscopy device
This invention relates to a compact cavity ring down spectrometer for detection and measurement of trace species in a sample gas using a tunable solid-state continuous-wave mid-infrared PPLN OPO...
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7535007 |
Multiple chamber dual channel infrared gas detection system
A gas sensor usable in harsh environments includes a multiple chamber radiant energy transmission path which extends between a multi-channel emitter and a multi-channel detector. Chamber length and...
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7535006 |
Gaseous uranium hexafluride isotope measurement by diode laser spectroscopy
A device and method for measuring the relative amounts of 235 U and 238 U in the gaseous phase of UF 6 using tunable diode laser spectroscopy (TDLS). The invention is a faster, more accurate...
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7528373 |
Method and system for detection of gas leakage sources
A system for detection of gas leakage sources. An open-path FTIR detection system is located before the return filter of recirculating air of a factory to detect gas composition of recirculating...
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7525093 |
Liquid or gas sensor and method
A fluid sensor is provided which contains a fluid cell ( 1 ) to enclose a volume of fluid ( 7 ), i.e., a gas or liquid, to be analyzed, in addition to a method for producing such a fluid sensor. An...
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7524681 |
Rapid assay for biological substances using FTIR
The present invention relates to a method for determining the condition of a biological fluid by recording the IR spectrum of a sample of the biological fluid. To this end, the biological fluid can...
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7518113 |
Pressure sensor
A pressure sensor having a diaphragm which is differently deformable or locally changeable by pressure differences is described. A construction advantageously usable even in poorly accessible...
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7507967 |
Infrared gas detector
An infrared gas detector includes an infrared light source for emitting infrared light, an infrared sensor for detecting the infrared light from the infrared light source, and a housing having a...
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7501630 |
Gas measurement system
A gas measurement system of this invention includes a housing adapted to be mounted on an airway adapter, and a luminescence quenching gas measurement assembly disposed in the housing. The...
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7488942 |
Gas sensors
A gas sensor of the type having a housing defining a chamber within which light is transmitted from a source to a detector through an optical path, includes internal mirror portions having part...
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7482591 |
Carbonate scale detector
An apparatus and method for detecting carbonate scale. An energy emitting device transmits energy through one optical window, through a fluid stream, and out through a second optical window where...
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7477395 |
Measuring device
A measuring device for determining the concentrations of gases by radiation absorption. The device includes at least one radiation source for generating radiation, a measuring cell, which is...
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7473898 |
Cryogenic terahertz spectroscopy
A terahertz spectroscopy system includes a source of terahertz radiation, a detector of terahertz radiation, a source of sample gas, and a sample cell that can be cooled to cryogenic temperatures....
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7473897 |
System, method, and computer program for conducting optical transmission measurements and evaluating determined measuring variables
A device for conducting a transmission measurement includes a system for generating a light wave consisting of a first and a second wavelength fraction, in addition to an optical channel guiding...
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7459699 |
Method of determining processing position in charged particle beam apparatus, and infrared microscope used in the method
A laser mark which will be the positioning mark for a secondary charged particle image in the charged particle beam apparatus is applied by moving the sample processing/observation area in the...
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7456971 |
Optical gas sensing apparatus
An optical gas sensing apparatus for sensing gas includes a tubular housing member, a column light source member, a column light sensing element member and an adhesive. The tubular housing member...
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7456969 |
Device and method for monitoring the oxygen concentration in an aircraft tank
The invention relates to a device for monitoring the oxygen concentration in an aircraft tank. The device includes an absorption measuring section equipped with a laser or laser diode ( 6 ), a...
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7446317 |
Multipass cell for gas analysis using a coherent optical source
A multi-pass gas cell that operates with reflected radiation pass through a gas, the reflected radiation transmitted and received by first and second fiber optic ports that are subject to an...
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7442936 |
Infrared spectroscopy method for measuring the base number of overbased lubricants
The present invention provides a method for measuring a lubricant's total basicity by measuring one or more preselected infrared absorption bands of a lubricant and correlating the measured bands...
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7435963 |
Flow cell and methods of use thereof
This invention provides devices and apparatuses comprising the same, for windowless optical detection of particle-laden samples, for example aerosols or fluid suspensions. The devices make use of...
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7435391 |
Light-mediated micro-chemical reactors
A chemical reactor includes two substrates that are joined along a surface and a chemical reaction chamber formed between the substrates. The chemical reaction chamber has a hollow interior and one...
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7432508 |
Gas measurement system
A gas measurement system of this invention includes a detector assembly having a beamsplitter adapted to separate infrared radiation into a first beam and a second beam and a mirror adapted to...
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7427760 |
Infrared spectrometer
Method and apparatus for detecting, by absorption spectroscopy, an isotopic ratio of a sample, by passing first and second laser beams of different frequencies through the sample. Two IR absorption...
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7420172 |
System and method for measuring water vapor in natural gas
The amount of water vapor in natural gas at different levels, including at levels below 10 ppmv, is measured by directing a light from a quantum cascade laser at a frequency in the 5.01 to 5.03...
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7414244 |
Mixing ration detecting apparatus, method of controlling mixing ration detecting apparatus, and fuel cell system incorporating mixing ratio detecting apparatus
A mixture ratio detecting apparatus comprises: a light source which emits light including light of an infrared region; a first light detecting unit which detects the light of the infrared region...
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7397564 |
Turbidity sensor
The invention relates to a turbidity sensor comprising an operational assembly which is housed in a structure ( 1 ) and which is equipped with a support ( 3 ) having a base ( 5 ) from which pins (...
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7382459 |
Spectroscopic gas sensor, in particular for detecting at least one gas component in the ambient air, and method for manufacturing a spectroscopic gas sensor of this type
A spectroscopic gas sensor is provided, in particular to detect at least one gas component in the ambient air, and a method for the manufacture of a spectroscopic gas sensor of this type. The gas...
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7379178 |
Flow through cell for optical spectroscopy
A flow through cell ( 100 ) for use in a spectrophotometer for analysis of dissolved chemical substances in a flowing liquid stream is made up of at least an intermediate body member ( 114 )...
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7373257 |
Photometrically modulated delivery of reagents
A process system adapted for processing of or with a material therein. The process system includes: a sampling region for the material; an infrared photometric monitor constructed and arranged to...
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7354553 |
Method and apparatus for detecting the presence of elemental mercury in a gas sample
An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an...
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7351976 |
Monitoring system comprising infrared thermopile detector
The present invention relates to a semiconductor processing system that employs infrared-based thermopile detector for process control, by analyzing a material of interest, based on absorption of...
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7339657 |
Low-cost on-line and in-line spectral sensors based on solid-state source and detectors combinations for monitoring lubricants and functional fluids
A series of optical spectral sensors is based on a combination of solid-state sources (illumination) and detectors housed within an integrated package that includes the interfacing optics and...
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7339168 |
System and method for detecting water vapor within natural gas
A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877-1.901 μm,...
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7332719 |
Gas sensor arrangement with improved long term stability and measuring method
The present invention relates to a gas sensor arrangement comprising at least one radiation source emitting radiation, a gas measuring chamber which may be filled with a gaseous analyte containing...
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7326931 |
Gas sensor assembly and measurement method with early warning means
The invention relates to a method for measuring the presence and/or the concentration of an analyte using a gas sensor assembly and to a corresponding gas sensor assembly. The gas sensor assembly...
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7323687 |
infrared gas analyzer and infrared gas analysis method
There are provided an infrared gas analyzer of a simple configuration, capable of taking measurements with high precision when using an infrared light source excellent in thermal responsiveness,...
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7307259 |
System and method for controlling composition for lithography process in real time using near infrared spectrometer
A system and a method for controlling the multi-component composition such as photoresist, stripper, developer, etchant, thinner, rinser/cleaner and etch bead remover, for a lithography process,...
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7301641 |
Fiber optic smoke detector
A passive sensor housing has an air gap formed therein between a collimating lens and a lens focused mirror reflecting optical light signals transmitted through the lens into the air gap within...
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7301640 |
System and method of condensation reduction in an electrical unit
A non-dispersive infra-red gas detector includes a condensation eliminating heater. The heater can be intermittently energized in response to a signal received from an environmental sensor. Signals...
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7294839 |
Low volume sample cell and gas monitoring system using same
A sample cell, which is a component of a gas monitoring system, includes a sample cell body and a sample cell core installed therewith. The sample cell is coupled to a sampling tube that...
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7291851 |
Infrared source modulation and system using same
A method of modulating an infrared radiation (IR) source that includes applying a time-varying, periodic voltage signal to the IR source, measuring a parameter of the voltage signal, and adjusting...
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7291836 |
Method and device for continuous determination of lubricating oil consumption of an internal combustion engine
The invention relates to a method and device for the continuous determination of the lubricating oil consumption of an internal combustion engine. The inventive method consists in: placing a...
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