Class / Patent application number | Description | Number of patent applications / Date published |
250343000 | With means to transmission-test contained fluent material | 46 |
20080251726 | Infrared gas sensing apparatus and method - An infrared gas sensing apparatus for sensing gas includes an infrared source for emitting infrared light, a wavelength tunable filter for selectively allows passage of the infrared light at a specific wavelength, an infrared detector for detecting the amount of the filtered infrared light, and a control circuit for controlling the wavelength tunable filter. The control circuit has a check circuit that checks whether the wavelength tunable filter selects a collect wavelength. The check circuit controls the wavelength tunable filter so that the wavelength tunable filter allows passage of the infrared light at a wavelength within a wavelength range where atmospheric gases do not absorb the infrared light. The check circuit checks whether the wavelength tunable filter operates normally by comparing the amount of the filtered infrared light with a reference value. | 10-16-2008 |
20080251727 | Multigas Monitoring and Detection System - A spectroscopic detection system is described for monitoring ambient air for toxic chemical substances. The system can be a compact, portable multiple gas analyzer capable of detecting and discriminating a broad range of chemical constituents including various nerve and blister agents as well as toxic industrial chemicals at low or sub part per billion (ppb) levels. The system minimizes false alarms (e.g., false positives or negatives), features high specificity, and can operate with response times on the order of a few seconds to a few minutes, depending on the application. The system can be an entirely self-contained analyzer, with a Fourier Transform Infrared (FTIR) spectrometer, a gas sample cell, a detector, an embedded processor, a display, power supplies, an air pump, heating elements, and other components onboard the unit with an air intake to collect a sample and an electronic communications port to interface with external devices. | 10-16-2008 |
20080308733 | OPTICAL GAS SENSOR - There is disclosed a gas sensor comprising an electromagnetic radiation source, a detector which is sensitive to radiation from the source and a waveguide which comprises at least a part of an optical path from the source to the detector through a gas sample, the waveguide comprising a first waveguide portion which extends from the radiation source and a reflector which is arranged to change the direction of and laterally displace radiation conducted from the source through the first waveguide portion into a second waveguide portion which is separate to the first waveguide portion and which conducts received radiation towards the detector. The gas sensor can be formed as a layered structure. A convoluted passage allows gas access to the optical path. | 12-18-2008 |
20090008560 | Method and Apparatus for Detecting Gas Conveyed by Drilling Fluids - A method of detecting gas conveyed in a drilling fluid (M) returning from a well ( | 01-08-2009 |
20090026374 | APPARATUS FOR GAS CONCENTRATION MEASUREMENT ACCORDING TO GAS CORRELATION METHOD - A gas concentration measuring apparatus utilizing a gas correlation method capable of measuring concentrations of a plurality of analyte gases simultaneously and at high sensitivity uses an infrared light source ( | 01-29-2009 |
20090039266 | 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 infrared light at a characteristic wavelength by such material. In one embodiment, an infrared light beam is transmitted through a linear transmission path from an infrared light source through a sampling region containing material of interest into the thermopile detector. The linear transmission path reduces the risk of signal loss during transmission of the infrared light. The transmission path of the infrared light may comprise a highly smooth and reflective inner surface for minimizing such signal loss during transmission. | 02-12-2009 |
20090050809 | Fluid Flow Monitoring Device - A device for use in monitoring optical markers present in a liquid flowing in a conduit comprises a transparent tube | 02-26-2009 |
20090072148 | Method and apparatus for detecting wood eating insect infestation in enclosed shipping containers or in trees - An apparatus and method for detecting wood eating insect infestations. For trees, a baseline air sample is taken outside of the tree to determine a baseline CO2 concentration. A second CO2 sample is taken from underneath the bark of the tree. The results of the sample taken from underneath the bark of tree are compared to the baseline sample. An increased CO2 indicates a hidden wood eating insect infestation somewhere in the tree, even though the location of the infestation may be far removed from the place of sampling. For a shipping container, a baseline sample of air near the CO2 container is taken, then a sample is taken from the bottom of a shipping container. A shipping container need not be filled with wood products, rather wood products only be present as packing or support materials. The comparison is made between the baseline CO2 with the CO2 sample taken from inside the shipping container. An increased CO2 concentration is an indication of a hidden wood eating insect infestation inside the shipping container. | 03-19-2009 |
20090127465 | Obstruction Detection Device - The obstruction detection device for an infrared intruder detection system comprises at least one transparent facet having a roughened surface; a light emitter arranged for emitting light towards the roughened surface; a light detector arranged for detecting the intensity of light, which is transmitted or reflected or diffracted by the roughened surface into a specific direction of space; and an output device for outputting an alarm-signal, when an absolute difference between the intensity of the detected light and a reference value exceeds a threshold value. A liquid or spray applied onto the roughened surface changes its scattering patterns. This change triggers the alarm-signal. | 05-21-2009 |
20090184248 | 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 state, and wherein the air inside the chamber is pumped out to attain a vacuum state with a high pressure suction activity. The thin-chamber design of the present invention can decrease the number of the components and reduce the cost. The special assembly design of the vacuum chamber of the present invention can effectively decrease the length of the transmission cable and thus can reduce signal attenuation and noise interference. The present invention has the advantage of convenient operation and is very suitable to a two-dimensional infrared sensor. | 07-23-2009 |
20090184249 | Pulverized Bulk Material Planetary and Double Helix Analyzer System - A system for analyzing a bulk material including a tube for transporting a stream of a bulk material, a plurality of illuminators for directing radiation through the stream and arranged about a circumference of the tube, a plurality of detectors arranged substantially opposite the illuminators, and at least one spectrometer for receiving and analyzing data from the plurality of detectors. | 07-23-2009 |
20090236529 | DETECTING APPARATUS, AND DETECTING METHOD - A detecting apparatus for detecting information of a liquid object or sample includes a transmission path, a THz wave supplying unit, a THz wave detecting unit, and an infiltrative holding member for infiltration and holding of a liquid object. The supplying unit supplies an electromagnetic wave in a frequency range between 30 GHz and 30 THz to the transmission path. The detecting unit detects the THz wave transmitted through the transmission path. The infiltrative holding member is set at a location containing at least a portion in which an electric field distribution of the THz wave propagating along the transmission path extends. | 09-24-2009 |
20100006761 | INFRARED RADIATION SOURCES, SENSORS AND SOURCE COMBINATIONS, AND METHODS OF MANUFACTURE - A blackbody radiation device ( | 01-14-2010 |
20100072371 | PHOTOMETRIC METHOD AND APPARATUS FOR MEASURING A LIQUID'S TURBIDITY, FLUORESCENCE, PHOSPHORESCENCE AND/OR ABSORPTION COEFFICIENT - Apparatus derives a sample liquid property and has a container with an outlet section having an overflow edge at a horizontal sample surface. A light source above the surface generates a probe light beam at a non-zero angle β | 03-25-2010 |
20100102235 | MINIATURE THERMOPILE SENSOR - A thermopile sensor for detecting infrared radiation arriving in an axial entering direction. The thermopile sensor comprises a metal housing that has a base section and a mantle section, a cavity between said mantle section and said base section, an opening in said mantle section opposite said base section for entering of said infrared radiation, thermopile chip on a top surface of the base section, electrical connectors connected to said thermopile chip(s) and which extending through said metal, and a radiation transparent window. Said thermopile sensor is a miniature sensor construction, in which said cavity has an inner dimension adapted for at least one thermopile chip. Said base section has an outer base dimension and a base thickness forming the first part of a thermal mass, and said mantle section extends with a length from said base section and has a wall thickness around said opening forming a second part of said thermal mass, which surrounds said thermopile chip. Electrical connectors are metal film leads on an electrical insulation membrane. | 04-29-2010 |
20110147592 | ARRANGEMENT ADAPTED FOR SPECTRAL ANALYSIS OF SMALL CONCENTRATIONS OF GAS - This invention comprises an arrangement adapted for a spectral analysis, said arrangement having an IR (Infra Red light) transmitting means adapted for an electromagnetic radiation, a limited space in the form of a cavity serving as a measuring eel! and intended to be able to define an optical measuring distance or path, a sensing means for said electromagnetic radiation, passing said optical measuring distance from said transmitting means to said sensing means, and a unit performing the spectral analysis and connected at least to said sensing means. Said sensing means for the electromagnetic radiation is opto-electrically adapted sensitive to the electromagnetic radiation which is intended to fall within the spectra! area whose selected wavelength components or spectral elements are to become the subject of an analysis in the unit performing the spectral analysis, so as to determine in this unit, over calculations, the relative radiation intensity of the spectral element. Said electromagnetic radiation is adapted to be permitted to pass, with a predetermined energy, the space, in which the sample of gas is disposed, under a predetermined overpressure 1 such as an overpressure variable in time. A correction circuit is adapted to have a produced fictive measuring value reduced to a measuring value that is representative at atmospheric pressure. | 06-23-2011 |
20110198500 | Novel method for on-line measurement in simulated moving bed units and application to control and regulation of said units - The present invention describes a method for measuring the concentrations of species present at one point of a separation unit functioning in simulated moving bed mode (SMB), using an immersing probe located at one point in the unit or on one of the streams entering or leaving said unit, and a thermocouple located in the vicinity of the immersing probe, in which a Raman spectrum obtained using a laser source functioning at a wavelength of 785 nm is utilized.
| 08-18-2011 |
20110198501 | ANALYSIS APPARATUS - An analysis apparatus for analyzing a gas by a terahertz wave or an infrared ray comprises a generator for generating the terahertz wave or the infrared ray; a trapping unit having a trapping film for trapping a gas and being placed to be capable of causing interaction between the gas trapped by the trapping film and the terahertz wave or infrared ray generated by the generator; and a detector for detecting the interaction of the gas with the terahertz wave or infrared ray; wherein the trapping unit comprises a structure for contact with a site evolving the gas; and the structure holds the trapping film separately from the site. | 08-18-2011 |
20120074325 | GAS EXCHANGE SYSTEM FLOW CONFIGURATION WITH THERMALLY INSULATED SAMPLE CHAMBER - System flow path designs that minimize the impact of gas diffusion sources and sinks. By reducing the magnitude of parasitic sources and sinks, lower rates of photosynthesis and transpiration can be more accurately measured, e.g., without the need for extensive empirical compensation. According to one aspect, a gas exchange analysis system includes a sample chamber defining a measurement volume for analysis of a sample, the sample chamber having an inlet and an outlet, wherein the internal surface(s) of the chamber defining the measurement volume are metal plated. The system also typically includes a source of gas coupled with the inlet of the sample chamber, and a gas analyzer coupled with the outlet of the sample chamber and configured to measure a concentration of one or more gases exiting the chamber, whereby the metal plated internal surface(s) of the chamber reduces sorption of the one or more gases within the chamber. The low thermal conductivity of the chamber substrate material provides an energy efficient means of sample temperature control. The low density of the chamber substrate material reduces chamber weight for improved portability and ergonomics.” | 03-29-2012 |
20120097852 | GAS ANALYZER FOR MEASURING AT LEAST TWO COMPONENTS OF A GAS - A gas analyzer for measuring at least two components of a gas is disclosed herein. The gas analyzer comprising an emitter configured to emit infrared radiation through the gas, a filter assembly configured to permit a transmission of predetermined wavelengths emitted by the emitter, and a detector configured to receive wavelengths emitted by the emitter and penetrated through the filter assembly. The filter assembly comprises at least two tunable narrowband interference filters in series, each of the filters comprising two dielectric mirrors and an air space between the two dielectric mirrors to tune one of the filters to different transmission band than another of the filters. | 04-26-2012 |
20120199744 | MEASURING CELL ADAPTED TO SPECTRAL ANALYSIS - A measuring cell adapted for a spectral analysis of a gas sample, where this measuring cell is designed and adapted to co-ordinate, from an IR generating element, emitted converging and/or diverging light beams in a direction toward an IR receiving element, by a plurality of reflections of emitted light beams from a number of reflection surfaces assigned to the inner cavity of the measuring cell, thereby creating a predetermined measuring distance in the inner cavity of the measuring cell, from the IR generating element to the IR receiving element. The cavity of the measuring cell is adapted to contain the gas sample intended for a spectroanalytical absorption measurement. Light beams from the IR generating element are, via a reflection surface, convergingly directed to and/or adapted, such as reflectable, in a first reflection surface in order to, when reflected, via a first focal point, as diverging light beams become directed to a second reflection surface, shaped as a concave reflection surface, as well as via third and fourth reflection surfaces become converging to a focal point, in or in the vicinity of the IR receiving element, in order to form a compact measuring cell. | 08-09-2012 |
20120273682 | VOLATILE ORGANIC COMPOUND SENSOR - A volatile organic compound sensor includes a source of infrared (IR) light, a detector for detecting the IR light, and a space defined between the IR light source and the IR light detector. The space includes volatile organic compounds (VOCs). The IR light detector measures an amount of IR light transmitted through the space, the measured IR light transmitted being attenuated by VOC light absorption when in the space. An amount of the IR light attenuation is related to a concentration of the VOCs present in the space. | 11-01-2012 |
20130026369 | GAS SENSOR WITH RADIATION GUIDE - An optical absorption gas sensor includes a radiation source, detector and a radiation guide. The radiation source and detector are close together and in thermal communication. The radiation guide has a rectangular cross section and curves in a first sense, around an axis parallel to the major dimension of the rectangular cross section, and then in a second opposite sense, and again in the first sense. A relatively long path for radiation is provided in a compact device, without the attenuation of radiation which would occur if the radiation guide did not have a rectangular cross section and curved only around an axis parallel to the major dimension of the rectangular cross section. A reference measurement can be obtained by mounting a reference radiation source behind a translucent measurement radiation source and directing radiation from the reference radiation source through the measurement radiation source. Radiation from a reference radiation source may be directed around the measurement reference source. Measurement and reference signals can be obtained by using a light emitting diode to generate radiation which is detected by a photodiode, in a first operating mode, and driving the photodiode to generate radiation having a different emission spectrum while detecting the resulting radiation using the light emitting diode, in a second operating mode. An optical absorption gas sensor may be manufactured by abutting two or more L-shaped radiation guide portions to form a radiation guide. The radiation guide has an interior surface operable to reflect radiation emitted by the radiation source of the optical absorption gas sensor. | 01-31-2013 |
20130221224 | GAS ANALYZER AND OPTICAL UNIT FOR USE THEREIN - A gas analyzer contains an optical block inside which a channel is formed from its inlet to outlet for infra-red radiation passage, a control unit connected to the optical block inlet and outlet, and an infra-red radiation source located at the optical block 1 inlet, as well as an infra-red radiation detector installed at the said block outlet; used as an infra-red radiation source is a quick- acting differential photovoltaic detector with a mirror filter, whose reflection and spectral characteristics of transmission are consistent with the measured gas absorption spectrum and spectrum of the infra-red radiation source correspondingly. The gas analyzer achieves high sensitivity and minimum energy consumption. The optical block contains the inner channel for infrared radiation passage, the infra-red radiation source located at the channel inlet and the infra-red radiation detector located at the channel outlet. At that, the channel is made in the form of a multiway mirror optical tray capable of concentrating the transmitted infra-red radiation from its inlet, along its path and at its outlet to the detector of this radiation, and as an infra-red radiation source, a quick-acting pulse LED is used, which creates the directional infra-red radiation to the concentrator located in the tray. The gas analyzer optical block provides for high coefficient of IR radiation transmission, minimum dissipation of radiation energy from its source to detector, and small sizes. | 08-29-2013 |
20130334423 | Non-Dispersive Infrared Sensor with a Reflective Diffuser - The present application provides a non-dispersive infrared gas sensor. The non-dispersive infrared gas sensor may include an infrared source, an infrared detector, and a waveguide extending about the infrared source and the infrared detector. The waveguide may include a reflective diffuser thereon. | 12-19-2013 |
20140103213 | Method And Apparatus For Graphene-Based Chemical Detection - A chemical sensor is provided. The sensor includes at least one lightguiding element having an optical core. The lightguiding element comprises a layer of graphene situated in sufficient proximity to the core to exhibit evanescent wave absorption of optical energy in at least one optical mode guided in the core. | 04-17-2014 |
20140124672 | DEVICE WITH A MEASUREMENT ARRANGEMENT FOR OPTICAL MEASUREMENT OF GASES AND GAS MIXTURES, WITH COMPENSATION OF ENVIRONMENTAL EFFECTS - A device for optical detection of a target gas in gas mixtures includes an operation and evaluation unit, a measurement cuvette with optically reflective surfaces on its interior walls and a gas inlet to the environment, a radiation source, a measuring detector and a reference detector unit provided on the measurement cuvette. The measuring detector and the reference detector unit detect the light of the radiation source and produce electrical signals corresponding to the intensity of the detected light. An optical bandpass filter element, constructed to transmit light of a measurement wavelength, is arranged upstream of the measuring detector. An optical double-bandpass filter unit, that transmits light of a first reference wavelength and light of a second reference wavelength, is arranged upstream of the reference detector unit. The operation and evaluation unit operates the radiation source and acquires the electrical signals of the measurement detector and the reference detector unit. | 05-08-2014 |
20140124673 | MEASURING SYSTEM FOR MEASURING THE CO2 CONCENTRATION IN A CLIMATE CABINET OR AN INCUBATOR - A measurement system for measuring the CO | 05-08-2014 |
20140131581 | GAS DETECTION SYSTEM AND RADIATION EMITTING DEVICE FOR THE GAS DETECTION SYSTEM - A gas detection system comprising a case having a hollow chamber, a gas input port, a gas output port, a radiation emitting device, and a photo detector. The gas input port may be disposed on the case for a test gas flowing into the chamber. The gas output port may be disposed on the case for the test gas flowing out of the chamber. The radiation emitting device may be disposed on the case and operated in a surface plasmonic mode or a waveguide mode for emitting a narrow bandwidth thermal radiation light source with multi-peak wavelengths into the chamber, wherein the multi-peak wavelengths may comprise a first absorption wavelength and a second absorption wavelength of the test gas. The photo detector may be disposed on the case for detecting light intensity of the light source passing through the chamber to determine the concentration of the test gas. | 05-15-2014 |
20140131582 | METHOD AND SYSTEM FOR DETERMINING ENERGY CONTENT AND DETECTING CONTAMINANTS IN A FLUID STREAM - Methods and systems for real time, in situ monitoring of fluids, and particularly the determination of both the energy content and contaminants in a gas or oil transmission facility, are provided. The system may include two separate scanning sources to scan two different, but overlapping, NIR ranges, or may involve two separate scans from a single scanning spectroscopy source. The first scan ranges from approximately 1550 nm up through 1800 nm and a second scan concurrently scans at a high resolution across a band from approximately 1560-1610 nm, the wavelength of interest for hydrogen sulfide (though similar scans are contemplated in alternative wavelength ranges for alternative contaminants). The second scan may provide very narrow (0.005 nm) step resolution over just the wavelength of interest for the contaminant and may scan at a substantially higher power level. The spectroscopic optical data from the two scans, however obtained, must then be combined into an analytical processing module containing models that analyze the multi-scan data and yield both energy content and contaminant quantitative data. | 05-15-2014 |
20140217292 | ON-BOARD DIESEL EMISSIONS DIAGNOSTIC AND MONITORING SYSTEM - An apparatus and system for monitoring and communicating emissions data for a diesel engine. An exhaust gas analyzer uses infrared light to measure the quantity of trace gases and particulates in an exhaust gas outlet from a diesel engine. The gas analyzer preferably includes a logic processor to interpret the measured data and a memory device to store the measured data. A radio transmitter, cellular data transmitter, or Smartphone transmits the measurement data. In a diagnostic and monitoring system for a diesel engine, the exhaust gas analyzer is in contact with the exhaust gases from the diesel engine, preferably in the tailpipe. A data receiver receives the measurement data transmitted by the radio transmitter, cellular data transmitter, or Smartphone. | 08-07-2014 |
20140291525 | VARIABLE GEOMETRY OPTICAL GAS DETECTOR - An optical gas detector ( | 10-02-2014 |
20140291526 | GAS ANALYSER - A gas analyser for the absorption-spectroscopic in-situ determination of at least one chemical and/or physical parameter of a gaseous measurement medium, wherein the gas analyser includes a first housing; at least one laser as a radiation source, which laser is arranged in the first housing; at least one first process window for coupling the radiation emitted by the laser into a measurement medium; and at least one detector by which, following interaction with the measurement medium, the radiation is detected. The first process window can be configured as an afocal meniscus lens having a convex surface and a concave surface. | 10-02-2014 |
20140326889 | DETECTOR - The detector in accordance with the present invention includes: a light emitter; a light receiver; and a light guiding member which includes a detection space for determining a state of a predetermined gas and is configured to guide light emitted from the light emitter to the at least one light receiver through the detection space. An internal surface of the detection space of the light guiding member includes a reflective surface causing reflection of light emitted from the light emitter. The reflective surface is a concave ellipsoidal surface having a long axis defined by a straight line determined by the light emitter and the light receiver. The reflective surface has a first focal point at a position of the light emitter and a second focal point on an opposite side of the light receiver from the first focal point. | 11-06-2014 |
20140361176 | SYSTEM AND METHOD OF MONITORING COMPOSITION OF A FLOW OF BREATHABLE GAS USING A DETECTOR AND EMITTER POSITIONED ON THE SAME SIDE OF THE FLOW OF BREATHABLE GAS - A gas measurement module ( | 12-11-2014 |
20140367574 | SHOCKPROOF GAS SENSOR - A shockproof gas sensor includes a gas detector, an infrared source, an infrared detector a circuit board and at least one shockproof unit. The gas detector defines a chamber, a first end portion and a second end portion opposite the first end portion. The infrared source is disposed in the chamber proximate to the first end portion while the infrared detector is disposed in the chamber and proximate to the second end portion. The circuit board is respectively electrically connected to the infrared source and the infrared detector. The shockproof unit is coupled to the gas detector and the circuit board, and the gas detector is secured on the circuit board by the shockproof unit. | 12-18-2014 |
20150053861 | Interference-compensating NDIR Gas Sensor for Measuring Acetylene - A gas sample separated from transformer oil is circulated through an NDIR gas sensor system which obtains an acetylene concentration by calculating a detected acetylene concentration obtained by an absorption biased (“AB”) NDIR acetylene gas sensor, calculating a detected carbon dioxide concentration obtained by an AB NDIR carbon dioxide gas sensor, calculating a detected water vapor concentration obtained by an AB NDIR water vapor NDIR gas sensor and then determining the acetylene concentration from the detected acetylene concentration through use of the detected carbon dioxide and water vapor concentrations to compensate for their interference. | 02-26-2015 |
20150083922 | SPECTROSCOPY SYSTEM USING WAVEGUIDE AND EMPLOYING A LASER MEDIUM AS ITS OWN EMISSIONS DETECTOR - An intracavity laser absorption infrared spectroscopy system for detecting trace analytes in vapor samples. The system uses a spectrometer in communications with control electronics, wherein the control electronics contain an analyte database that contains absorption profiles for each analyte the system is used to detect. The system can not only detect the presence of specific analytes, but identify them as well. The spectrometer uses a hollow cavity waveguide that creates a continuous loop inside of the device, thus creating a large path length and eliminating the need to mechanically adjust the path length to achieve a high Q-factor. In a preferred embodiment, the laser source may serve as the detector, thus eliminating the need for a separate detector. | 03-26-2015 |
20150129770 | OPTICAL GAS SENSOR - A system includes a sensor configured to sense an environmental condition. The sensor includes an input/output (I/O) reconfiguration system. The sensor further includes a plurality of I/O connectors configured to interface with at least one external system, wherein the I/O reconfiguration system is communicatively coupled to at least one of the plurality of I/O connectors and is configured to derive a sensor function based on an indication received via the at least one of the plurality of I/O connectors, and wherein signals derived by the sensor based on the sensor function are provided via the plurality of I/O connectors. | 05-14-2015 |
20150316466 | OPTICAL SENSOR APPARATUS AND METHOD OF PRODUCING OPTICAL ELEMENT USED IN OPTICAL SENSOR APPARATUS - An optical sensor apparatus includes a light receiving element configured to produce an output according to a light receiving state, and an optical element including a reflecting layer including a metal film, and being arranged such that at least some of incident light on the light receiving element is light that is reflected by the reflecting layer. The optical element further includes a corrosion resistant layer for suppressing corrosion of the reflecting layer, and the reflecting layer includes a surface covered by the corrosion resistant layer formed by vapor plating. | 11-05-2015 |
20150330895 | INSTRUMENT FOR MEASURING THE CONCENTRATION OF WATER ISOTOPES IN A GAS SAMPLE LOADED WITH WATER VAPOUR - An instrument for measuring the concentration of water isotopes in a gas sample loaded with water vapour, includes an analyser; a vaporiser including a circuit that connects to the analyser to transmit a vaporised calibration liquid to the analyser and an output circuit for discharging the overflow of the vaporised calibration liquid, the output circuit arranged such that the overflow is discharged without passing through the analyser and a purge circuit connected to the input of the vaporiser for sucking said vaporised purge fluid through the vaporiser during a purge operation, the purge circuit arranged such that the vaporised purge fluid does not pass through the analyser; a selector for selectively establishing a first state establishing the circulation of the calibration liquid through the connection circuit and the circulation of the overflow through the output circuit and a second state establishing the circulation of the purge liquid through the purge circuit. | 11-19-2015 |
20150362672 | LIQUID SENSING SYSTEMS AND METHODS USING A RING RESONATOR SENSOR - A sensor system having a multi-pass interaction region is disclosed. The system includes an input region, a multi-pass region, and an output region. The input region is configured to receive emitted light. The multi-pass region is coupled to the input region and is configured to absorb portions of the emitted light according to a specimen proximate the multi-pass region. The output region is coupled to the multi-pass region and is configured to provide interacted light from the multi-pass region. | 12-17-2015 |
20160033396 | SYSTEMS AND METHODS OF INFRARED DETECTION OF COAL MINE POLAR GAS - An infrared detection device can be used to detect coal mine polar gas. The detection device can include a central processor and a gas pool assembly having a moveable optical window. The moveable optical window can include a stationary pool body and a moveable pool body inserted into the stationary pool body. | 02-04-2016 |
20160116402 | High-Sensitivity Terahertz Micro-Fluidic Channel Sensor and Preparation Method Thereof - A high-sensitivity terahertz micro-fluidic channel sensor and a preparation method thereof. The sensor includes a substrate and a cover layer, respectively provided with a metal plane reflector and a metal microstructure layer; a micro-fluidic channel is formed between the metal plane reflector and the metal microstructure layer; and when the micro-fluidic channel tests liquid, a composite structure formed of the metal microstructure layer, the test liquid and the metal plane reflector shows good absorption properties. The method includes forming a metal plane reflector and a metal microstructure layer on a substrate and a cover layer, respectively; fixedly connecting the substrate to the cover layer, and forming a closed micro-fluidic channel between the substrate and the cover layer; and forming a through via, communicated to the micro-fluidic channel, on the substrate and/or the cover layer, to form a flow channel for transferring liquid to be tested to or from the sensor. | 04-28-2016 |
250345000 | Plural beam/detector pairs | 2 |
20100163733 | AIRBORNE TUNABLE MID-IR LASER GAS-CORRELATION SENSOR - A method and apparatus for measuring target gas concentrations in an atmosphere. The method and apparatus emit in the atmosphere a laser beam tuned to a molecular absorption line of a target gas, receive a reflected signal affected by gas absorption of the target gas in the atmosphere, divide and direct the received signal into a first optical path and a second optical path including in one of the paths a correlation gas cell filled with a predetermined concentration of the target gas, detect transmitted signals through the first optical path and the second optical path, and calculate a target gas concentration by comparing a first signal transmitted through the first optical path to a second signal transmitted through the second optical path. The apparatus includes a laser source tunable to a specific molecular absorption line of a target gas and configured to emit in the atmosphere a laser beam having a spectral bandwidth greater than a full width of the molecular absorption line of the target gas, a receiver configured to receive a reflected signal affected by gas absorption of the target gas in the atmosphere, and at least one detector configured to detect transmitted signals through the first optical path and the second optical path. | 07-01-2010 |
20150144793 | DOSE MEASUREMENT SYSTEM AND METHOD - Embodiments described herein generally relate to devices, systems and methods for measuring the dose remaining in a drug delivery device that is used for delivering a dose to a patient. In some embodiments, a dose measurement system for measuring the liquid volume in a container includes a plurality of light sources which are disposed and configured to emit electromagnetic radiation toward the container. A plurality of sensors are located in the apparatus that are optically coupleable to the plurality of light sources and are disposed and configured to detect the electromagnetic radiation emitted by at least a portion of the light sources. The apparatus also includes a processing unit configured to receive data representing the portion of the detected electromagnetic radiation from each of the plurality of sensors. The processing unit is further operable to convert the received data into a signature representative of the electromagnetic radiation detected by the plurality of sensors. | 05-28-2015 |