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1219 results about "Gas analyzer" patented technology
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Precursor delivery system with rate control
InactiveUS20050095859A1Semiconductor/solid-state device manufacturingChemical vapor deposition coatingProcess engineeringDelivery system
A method and apparatus for a gas delivery system to deliver a precursor from a vessel to a process chamber via a process gas produced by flowing a first carrier gas into the vessel and combining with a second carrier gas flowing through a bypass around the vessel and a precursor monitoring apparatus disposed between the process chamber and the vessel. The precursor monitoring apparatus has a gas analyzer to generate a first signal indicative of a concentration of the precursor in the process gas or to a signal indicative of a flow rate of the process gas.
Owner:APPLIED MATERIALS INC
Closed loop residual gas analyzer process control technique
InactiveUS6955928B1Reduce the amount requiredSemiconductor/solid-state device testing/measurementSolid-state devicesResidual gas analyzerClosed loop
A technique for use in fabricating an integrated circuit are disclosed. The method generally begins by performing an operation on a wafer using a fabrication tool. Next, volatiles are desorbed from the wafer. The desorbed volatiles are sampled and raw spectral data indicating the content of the desorbed volatiles is generated. The raw spectral data is subjected to a spectroscopic analysis. An operational parameter of the fabrication tool is then modified responsive to the result of the results of the spectroscopic analysis. In one particular aspect of the invention, a controller receives the raw spectral data and processes the raw spectral data to determine the presence of a residual material on the wafer. The controller then controls the process flow operation to reduce the amount of the residual material on the wafer responsive to the results of processing the raw spectral data. Other aspects of the invention include the apparatus implementing the process flow and the controller itself.
Owner:TAIWAN SEMICON MFG CO LTD
Air gas analyzer window and a method for producing such a window
ActiveUS7629039B2Uniform material thicknessSatisfactory transmission propertyLayered productsRespiratory organ evaluationPlastic materialsLight beam
A window for use in an adapter for an IR gas analyser for analysing breathing gases, where the gases flow through a through-penetrating passageway in the adapter, which includes windows disposed on opposite sides of the passageway so as to enable an IR beam to be sent through the windows and through the passageway containing said breathing gases. Each window is a one-piece structure comprised of plastic material and has a round basic shape that includes a surrounding edge and a central part which is sunken in relation to the surrounding edge and which forms the window through which the IR beams or rays shall be able to pass. A method of producing such a window, by injection moulding a thermoplastic material in a mould where injection of the plastic material is also disclosed.
Owner:PHASEIN
Method and apparatus for controlling deposition process using residual gas analysis
InactiveUS6387823B1Vacuum evaporation coatingSemiconductor/solid-state device manufacturingGas analysisReactive gas
A method for controlling a deposition process, includes providing a wafer in a chamber of a deposition tool, the deposition tool being adapted to operate in accordance with a recipe; providing reactant gases to the chamber, the reactant gases reacting to form a layer on the wafer; allowing exhaust gases to exit the chamber; measuring characteristics of exhaust gases; and changing the recipe based on the characteristics of the exhaust gases. A deposition tool includes a chamber, a gas supply line, a gas exhaust line, a gas analyzer, and a controller. The chamber is adapted to receive a wafer. The gas supply line is coupled to the chamber for providing reactive gases. The gas exhaust line is coupled to the chamber for receiving exhaust gases. The gas analyzer is coupled to the gas exhaust line and adapted to determine characteristics of the exhaust gases. The controller is adapted to control the processing of the wafer in the chamber based on the characteristics of the exhaust gases.
Owner:GLOBALFOUNDRIES INC
Method and system for monitoring and reducing ruminant methane production
ActiveUS20090288606A1Low costEasy to measureMethane captureAnimal feeding devicesAgricultural scienceProximate
A method, and systems implementing such method, for reducing methane emissions by ruminants. The method includes providing a feed dispenser for feeding ruminants one or more nutrient supplements, and the feed dispenser includes a gas analyzer proximate to where the ruminant places its head. The method includes determining a particular ruminant has accessed the feed dispenser such as by reading an identifier from an RFID ear tag and operating the feed dispenser to provide a ration of methane-controlling nutrient supplement. The method includes using the gas analyzer to determine levels of carbon dioxide and methane and operating a data analyzing station to determine a ratio of methane to carbon dioxide and modify the type or amount of nutrient supplement for the ruminant for a next feeding to control methane production or achieve an animal production goal, such as by selectively operating a hopper with two or more supplements compartments.
Owner:CLOCK LTD
Method and system for monitoring and reducing ruminant methane production
ActiveUS20110192213A1Emission reductionEstimate dry-matter intake, digestibility, and animal efficiencyWithdrawing sample devicesAnimal feeding devicesEar tagAgricultural science
A method and system for reducing methane emissions by ruminants. The method includes providing a feed dispenser for feeding ruminants nutrient supplements, and the feed dispenser includes a gas analyzer where a ruminant places its head. The method includes determining a particular ruminant has accessed the feed dispenser such as by reading an identifier from an RFID ear tag and operating the feed dispenser to provide a ration of methane-controlling nutrient supplement. The method includes using the gas analyzer to determine levels of carbon dioxide and methane and operating a data analyzing station to determine a ratio of methane to carbon dioxide and modify the type or amount of nutrient supplement for the ruminant for a next feeding to control methane production or achieve an animal production goal, such as by operating a hopper with supplement compartments. The unit can be monitored remotely and controlled through an Internet connection.
Owner:CLOCK LTD
System, method and apparatus for mud-gas extraction, detection and analysis thereof
InactiveUS20060093523A1Maximum efficiencyFacilitates accurateComponent separationMaterial analysis by electric/magnetic meansWireless transceiverTransceiver
The application of a gas analyzer for gas mud logging is presented to measure gases in the return mud flow used in drilling processes. A supported membrane extraction probe from the analyzer is inserted into the mud flow. The probe extracts target gases from the mud through the membrane. Extracted gases are transported by an internal pump to an internal gas sensor unit. The infrared sensor unit is utilized to subject the gases to infrared emitted energy to excite the gasses at a molecular level for sensing and detection. The sensor then transfers sensed values electronically to a digital conditioning board. As the data is digitized in the conditioning board it is encoded with information to enable a means of correlating the derived sensor data. The data is then sent to a digital wireless transceiver for transport to a remote receiving transceiver connected to a microprocessor for data logging.
Owner:HYPERTEQ LP
Laser infrared gas analyzer based on TDLAS-WMS (tunable diode laser absorption spectroscopy-wavelength modulation spectroscopy)
ActiveCN102706832AAdjustable temperatureAvoid damageColor/spectral properties measurementsWater vaporData acquisition
The invention belongs to the technical field of gas detection and relates to a laser infrared gas analyzer based on TDLAS-WMS (tunable diode laser absorption spectroscopy-wavelength modulation spectroscopy) for detecting hydrogen chloride, methane, carbon monoxide, water vapor and other gases. The laser infrared gas analyzer comprises a laser, a laser driving circuit, a temperature control circuit, an optical system with an optical cavity, a main detector, a reference detector, an intensity modulation and canceling circuit, a phase-locking and amplification circuit and a data acquisition and display circuit, wherein the laser driving circuit and the temperature control circuit are used for controlling the laser to emit light, the two ends of the optical system are respectively connected with the laser and the detector, the intensity modulation and canceling circuit is used for canceling the influence of intensity modulation in the system, the phase-locking and amplification circuit is used for extracting harmonic signals, and the data acquisition and display circuit is used for displaying the concentration of the gas to be detected. Compared with other detection instruments, the laser infrared gas analyzer has the advantages that division operation is introduced into the intensity modulation and canceling circuit, and the laser infrared gas analyzer is combined with a space double-optical path differential detection method, so that the influence of the intensity modulation can be fundamentally canceled.
Owner:JILIN UNIV
Isotopic gas analyzer
InactiveUS7063667B1Low costShort path lengthWithdrawing sample devicesRespiratory organ evaluationCross sensitivityAbsorption cell
An NDIR spectrometer based on the use of wavelength specific lamp sources, whose emission spectrum consists of discrete, narrow lines characteristic of the isotope present in the lamp, and which it is desired to measure with the spectrometer. This allows very high intrinsic sensitivity, enabling the use of an extremely compact absorption cell with a very short path length. In addition, the source can be self-modulated, such that problems associated with external choppers are avoided. Furthermore, there is insignificant cross sensitivity between the isotopes themselves and between the isotopes and other ambient gases in the operating environment.
Owner:BREATHID 2006
Mid-IR laser instrument for analyzing a gaseous sample and method for using the same
InactiveUS20070064748A1Wide tunabilityRapidly tuned SLM idlerPolycrystalline material growthDiffusion/dopingNoseMicrometer
An optical nose for detecting the presence of molecular contaminants in gaseous samples utilizes a tunable seed laser output in conjunction with a pulsed reference laser output to generate a mid-range IR laser output in the 2 to 20 micrometer range for use as a discriminating light source in a photo-acoustic gas analyzer.
Owner:UNIVERSITY OF ALABAMA
Method and apparatus for downhole fluid analysis for reservoir fluid characterization
InactiveUS20050205256A1Interfere with measurementSurveyParticle separator tubesResidual gas analyzerSorbent
A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membrane-transmitted gas is analyzed in the vacuum chamber by a residual gas analyzer. An ion pump or sorbent is associated with the evacuated chamber to maintain the vacuum. The ion pump or sorbent removes gases and vapors from the chamber that diffuse into the chamber from the reservoir sample that is on the opposite side of the semi-permeable membrane.
Owner:BAKER HUGHES INC
Method and apparatus for downhole fluid analysis for reservoir fluid characterization
InactiveUS7219541B2Interfere with measurementSurveyParticle separator tubesResidual gas analyzerSorbent
A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membrane-transmitted gas is analyzed in the vacuum chamber by a residual gas analyzer. An ion pump or sorbent is associated with the evacuated chamber to maintain the vacuum. The ion pump or sorbent removes gases and vapors from the chamber that diffuse into the chamber from the reservoir sample that is on the opposite side of the semi-permeable membrane.
Owner:BAKER HUGHES INC
Gas analyzer
ActiveUS20100110437A1Quick measurementShort intake tubeThermometer detailsSamplingFast measurementCoupling
Gas analyzer systems and methods for measuring concentrations of gasses and in particular dry mole fraction of components of a gas. The systems and method allow for rapid measurement of the gas density and / or dry mole fraction of gases for a number of environmental monitoring applications, including high speed flux measurements. A novel coupling design allows for tool-free removal of a cell enclosing a flow path to enable in field cleaning of optical components.
Owner:LI COR
Mid-IR instrument for analyzing a gaseous sample and method for using the same
InactiveUS7606274B2Wide tunabilityRapidly tuned SLM idlerPolycrystalline material growthDiffusion/dopingNoseMicrometer
An optical nose for detecting the presence of molecular contaminants in gaseous samples utilizes a tunable seed laser output in conjunction with a pulsed reference laser output to generate a mid-range IR laser output in the 2 to 20 micrometer range for use as a discriminating light source in a photo-acoustic gas analyzer.
Owner:UNIVERSITY OF ALABAMA
Collection and analysis of a volume of exhaled gas with compensation for the frequency of a breathing parameter
ActiveUS20130165806A1Accurate compositional analysisWithout losing accuracyComponent separationMaterial analysis by electric/magnetic meansGas concentrationBiomedical engineering
Apparatuses are described to accurately determine a gas concentration of a sample of a patient's breath. The apparatuses may include a sample compartment, a breath speed analyzer, a gas analyzer, and a processor. The sample compartment includes an inlet that receives the breath. The breath speed analyzer determines the speed of a portion of the breath. The gas analyzer determines a gas concentration. The processor includes an algorithm that determines a degree of non-homogeneity of the sample based on the speed, and a corrected gas concentration based on the degree of non-homogeneity. In some variations, the gas correction is determined independently of patient cooperation. Apparatuses may be tuned based on the intended population's expected breathing pattern ranges such that the sample compartment is filled with a homogenous end-tidal gas sample regardless of an individual's breathing pattern. These apparatuses are useful, for example, for end-tidal CO analysis. Methods are also described.
Owner:CAPNIA INC
Method of measuring gas barrier property of plastic molding
InactiveUS20060169026A1Improve accuracyReduced measurement timeDetection of fluid at leakage pointMaterial analysis by electric/magnetic meansEngineeringPlastic film
Object of present invention to overcome a problem of a dispersion of an evaluation of gas barrier property depending on absorbed moisture of plastic, and carry out measurements in which a measurement value response is good and accuracy is good, wherein from the beginning of a container the gas barrier property of a plastic molded body does not depend on the amount of moisture absorbed thereof. A method of measuring the gas barrier property of the plastic molded body such as a plastic container, a plastic sheet or a plastic film or the like which uses a gas analyzer to measure the amount of permeation of a measurement object gas permeating through the plastic molded body, comprising: a heat drying process which heats and dries said plastic molded body in a temperature range which does not cause deformation or heat deterioration.
Owner:YOUTEC CO LTD +2
Gas analyzer calibration checking device
InactiveUS20050273016A1Improve accuracyHigh selectivityWithdrawing sample devicesSynthetic resin layered productsEngineeringMoisture
Owner:EXALENZ BIOSCIENCE LTD
Mobile vacuum sampling system
A mobile vacuum sampling system comprising: an inlet; a first filter; a gas sample vacuum pump; a solenoid valve; a sample tube; a pressure gauge; a first block valve; a second filter; a micro filter; a gasifier; a gas analyzer; and a computational, recording and / or analysis display device; wherein a natural gas stream enters the gas sample vacuum pump via the inlet and is compressed to between 3 and 5 psig; wherein the sample tube collects natural gas to be analyzed; wherein the gas analyzer is portable; wherein the gas analyzer analyzes gas samples from the sample tube; and wherein the entire system is contained within a truck or other mobile unit.
Owner:RHINESMITH R BRET
Non-invasive, miniature, breath monitoring apparatus
InactiveUS6955652B1Small amount of sampleReduce maintenanceDiagnostics using lightRespiratory organ evaluationOriginal dataNon invasive
A rugged, miniature, spectroscopic gas analyzer apparatus for rapid, non-invasive, multi-component breath monitoring and analysis and subsequent determination of Q or other medical diagnostic applications. The system is comprised of one or more IR emitters focussed by optical elements through a low volume sample cell receiving a sample input of a patient's breath for analysis. The patient either at rest or during exercise, inhales C2H2—SF6 mixtures (balance of oxygen and nitrogen) which is subsequently monitored upon exhalation for CO2, H2O, C2H2, and SF6 which can be employed to determine Q directly and accurately. Measurements are performed in real-time or via post-processing of stored original data. Due to its small size, ruggedness, and low power consumption, the monitor can conveniently be employed in the field or data can also be retrieved remotely using telemetry. The miniature analyzer operates on the principle of infrared absorption spectroscopy and allows very precise concentration measurements of the analytes of interest, without any bias or interference from other matrix components.
Owner:OAK CREST INST OF SCI
Method and apparatus for anatomical deadspace measurement
An apparatus and method for determining an anatomical deadspace volume VDANA of a patient. The apparatus includes a sensor that measures a parameter indicative of the volume of gas exhaled by the patient and a gas analyzer that measures a concentration of a gas constituent in the patient's expiratory flow. A controller determines the patient's anatomical deadspace volume based on signals provided by the sensor and the gas analyzer.
Owner:RIC INVESTMENTS LLC
Dosimetry using optical emission spectroscopy/residual gas analyzer in conjuntion with ion current
ActiveUS20080075834A1Liquid surface applicatorsMaterial analysis using wave/particle radiationDosimetry radiationOptical emission spectrometry
The present invention generally provides methods and apparatus for controlling ion dosage in real time during plasma processes. In one embodiment, ion dosages may be controlled using in-situ measurement of the plasma from a mass distribution sensor combined with in-situ measurement from an RF probe.
Owner:APPLIED MATERIALS INC
Carbon dioxide analyzer and analytical method thereof
InactiveCN101363796AEliminate the effects ofHigh precisionColor/spectral properties measurementsSpecial data processing applicationsGas chamberGas concentration
The invention discloses a carbon dioxide gas analyzer and an analysis method thereof. The optical probe of the analyzer adopts a spatial double-optical path structure which is composed of a single light source, a single gas chamber and double detectors. The analysis method comprises the following steps: firstly, the values of the voltage at the two ends of the main detector and the reference detector in the optical probe are measured when the light source is turned off , then the values of the voltage at the two ends of the main detector and the reference detector are measured when the light source is turned on and after the infrared light emitted from the light source passes through the gas chamber, after the treatment of error elimination, by using the Lambert-Beer's Law as the theoretical basis and by combining with the working mechanism of a spatial double-optical path optical structure, the measurement model of the analyzer is established and calibrated, therefore, the gas concentration of carbon dioxide can be directly calculated and output by the analyzer through the measurement value. The carbon dioxide gas analyzer has the advantages of small volume, light weight, low power consumption, high reliability and high measurement accuracy.
Owner:BEIHANG UNIV
Laser gas analyzer and its calibration method
ActiveCN101403692ADecrease the scaling factor αAvoid measurement errorsColor/spectral properties measurementsWavelengthGas concentration
The invention relates to a laser gas analyzer and a calibration method; wherein, the laser gas analyzer comprises a light source radiation unit used for generating semiconductor laser beams, a spectroscopy unit which respectively transmits the generated laser beams to a reference cell which is internally encapsulated by zero gas and gas to be measured with known consistency and a measurement cell where the gas to be measured is pumped into during the measurement process and the zero gas and end gas are respectively pump into during the calibration process, a reference detector which is used for obtaining the energy intensity of the laser beam which passes through the reference cell and positioning the absorption peak wavelength of the gas spectrum, and a measurement detector which is used for measuring the energy intensity of the laser beam which passes through the measurement cell and determining the gas consistency during the measurement process; and the calibration method combines the energy signals of the laser beams obtained by the two detectors with a specific arithmetic to carry out zero calibration and end calibration on the instrument. The laser gas analyzer has the advantages of wide application range, simple calibration operation process, saving time, reducing the production cost and usage cost and the like owning to the characteristics of sealed laser passage and multi-optical passages.
Owner:BEIJING BAIF MAIHAK ANALYTICAL INSTR
Smoke gas on-line monitoring system and smoke gas on-line monitoring method
ActiveCN104407161AAnalysis and detection are accurateStable flow rateMaterial analysisGas analysisParticulates
The invention relates to a smoke gas on-line monitoring system and a smoke gas on-line monitoring method, and aims at providing the smoke gas monitoring system and the monitoring method which have the advantages of being simple in structure, high in automation degree and accurate in monitoring. The system comprises a pitot pitometer, a smoke gas sampler, a particulate matter monitor, sampling pipelines and demarcating pipelines, wherein the pitot pitometer, the smoke gas sampler and the particulate matter monitor are all provided with anti-purging devices, signal receiving terminals of all the anti-purging devices are respectively connected with a central controller, and all the anti-purging devices are controlled by the central controller to regularly purge. Smoke gas collected by the smoke gas sampler successively passes through a first refrigerator, a gas filter, a second refrigerator and a membrane type filter, the collected smoke gas is cooled and filtered by the first refrigerator, the gas filter, the second refrigerator and the membrane type filter, and the rest smoke gas finally obtained is fed into a multicomponent gas analysis instrument to be analyzed and detected. For the system, whole calibrated pipelines and partial calibrated pipelines are also arranged, so that the analysis instrument in a line can be wholly calibrated and partially calibrated.
Owner:汇众翔环保科技股份有限公司
Method for continuous measurement of flux of gases in the lungs during breathing
ActiveUS7913690B2RespiratorsOperating means/releasing devices for valvesContinuous measurementOxygen
A method of calculating the flux of any gas (x) in a CBC circuit for a ventilated or a spontaneous breathing subject, for example said gas(x) being; a) an anesthetic such as but limited to; i)N2O; ii) sevoflurane; iii) isoflurane; iv) halothane; v) desflurame; or the like b) Oxygen; c) Carbon dioxide; or the like utilizing the following relationships; Flux of gas(x)=SGF (FSX−FEX) wherein SGF=Source of gas flow into the breathing circuit (CBC circuit) in liters / minute as read from the gas flow meter as set by the anesthesiologist; FSX=Fractional concentration of gas X in the source gas (which is set by the anesthesiologist); FEX=Fractional concentration of gas X in the end expired gas as determined by a portable gas analyzer, or the like.
Owner:THORNHILL SCI INC
Apparatus and method for controlling atmospheres in heat treating of metals
InactiveUS20060263256A1High precisionReduce manufacturing costMaterial analysis by electric/magnetic meansMaterial analysis by optical meansAbsorption cellElectromagnetic radiation
The present invention relates to an absorption gas analyzer for measuring a concentration of at least a component gas in a sample gas. The absorption gas analyzer comprises a main absorption cell for containing the sample gas for measurement therein. At least a narrow band emitter emits electromagnetic radiation in at least a predetermined narrow wavelength band which is transmitted through the main absorption cell. A reflecting device is disposed for reflecting the electromagnetic radiation after transmission through the main absorption cell such that the electromagnetic radiation is transmitted again therethrough. At least a detector detect the electromagnetic radiation and provide at least an intensity signal in dependence upon the concentration of the at least a component gas. The absorption gas analyzer enables simultaneous determination of concentration of a plurality of individual component gases with a high level of accuracy.
Owner:NITREX METAL
Temperature-humidity-stress-chemical coupling test platform for porous dielectric material
InactiveCN102944478AAchieve long-term mechanical loadingReal-time recording of multi-field coupling evolution processMaterial strength using tensile/compressive forcesGas compositionData acquisition
The invention discloses a temperature-humidity-stress-chemical coupling test platform for porous dielectric material. The test platform comprises a closed container, a load-bearing frame, a mechanical test system, an environment simulating system and a data acquiring system; the load-bearing structure is fixedly arranged at upper and lower two ends of the closed container; the mechanical test system comprises a loading device and a power device; the loading device is arranged in the enclosed container; the environment simulating system comprises a temperature simulating device and a humidity simulating device; the environment simulating system further comprises a chemical simulating device; the chemical simulating device comprises a chemical gas generator and a gas pipeline; the outlet of the gas pipeline is connected in the closed container; and a gas analyzer used for monitoring gas component and concentration is further arranged in the closed container. By adopting the test platform provided by the invention, the temperature and humidity changes in atmosphere environment and the influence of gas containing chemical substance to the long-term mechanical property of material can be simulated; and the test platform is feasible for mechanical multi-field coupling research on materials.
Owner:HOHAI UNIV
Method and apparatus for conditioning the atmosphere in a process chamber
InactiveUS6316045B1Eliminate the problemImprove efficiencyLiquid surface applicatorsSemiconductor/solid-state device manufacturingProcess engineeringProduct gas
In the invention, the atmosphere in a process chamber is conditioned using a primary pump, a secondary pump, speed control means for controlling the speed of the primary pump, and at least first gas analyzer means adapted for analyzing the extracted gases upstream from the primary pump and for producing first analysis signals. First signal processing means control the pumping speed as a function of the first analysis signals, so as to determine the variation in the pressure inside the process chamber during the transient stages of the treatment. In this way, deposits and turbulence are avoided in the process chamber, as are deposits in the pumping line, so that the secondary pump can be placed in the immediate vicinity of the process chamber.
Owner:ALCATEL LUCENT SAS
Whole process dynamic monitoring method for converter steel melting
ActiveCN101476014AHigh precisionQuality improvementProgramme controlComputer controlSteelmakingProcess dynamics
The invention pertaining to the field of metallurgy and steel-making technology provides a convertor steelmaking whole-course dynamic monitoring method. The whole-course dynamic control of the convertor steelmaking can be realized by adopting a laser gas analyzer and a stock bin port bombing technology, molten steel component and temperature are forecasted continuously and detected dynamically, and the convertor is assisted to perform the end point judgment. The method comprises steps of using a network of computer to monitor the information of charging, jetting and the like; using the laser gas analyzer as the gas signal acquiring and analyzing device in the convertor smelting process; using the bombing device installed at the stock bin port to performing head ejecting to detect information of molten steel component, temperature and the like; acquired parameters are all transferred through the network of computer; the computer continuously forecasts the parameters of molten steel component, temperature and the like by utilizing the above parameters and a built-in control model, and displays the parameters and provides guidance on the user interface.The invention has advantages that the whole-course feedback signals can be obtained, a whole-course dynamic control of the convertor smelting can be realized, variation of temperature and molten steel component can be forecasted continuously, the size of the convertor capability is not limited, and the convertor has characteristics of simple structure, convenient maintenance, small investment and low rate of fault.
Owner:北京北科麦思科自动化工程技术有限公司
Gas analysis device and method
ActiveCN103487593AGood test backgroundGuaranteed test accuracySemiconductor/solid-state device testing/measurementWithdrawing sample devicesGas analysisComputer module
Owner:RAINBOW SOURCE LASER RSLASER
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