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| Number | Title | Issue Date |
| 8183527 | Gas detecting method and gas detecting apparatus A concentration of ethanol is detected without using any light source such as a lamp by utilizing a face of a human being as a light source. The gas detecting apparatus has an optical filter for ethanol which allows to transmit an infrared light having a predetermin... | 05/22/2012 |
| 8158945 | Detector arrangement for a nondispersive infrared gas analyzer and method for the detection of a measuring gas component in a gas mixture by means of such a gas analyzer A detector arrangement for detection of a measuring gas component in a gas mixture is provided. The arrangement includes a gas analyzer, a first single-layer receiver and a further single-layer receiver, the first single-layer receiver containing the measuring gas c... | 04/17/2012 |
| 8143580 | Crossed biased filtering NDIR gas sensing methodology An NDIR gas sensor methodology for the design of a dual-gas sensor for the detection of two gases having a mutually interfering infrared absorption band such as that for CO2 and H2O at around 2.70μ or N2O and CO at around 4.40μ. Th... | 03/27/2012 |
| 8119988 | Collection-amount detection method for particulate matters and collection-amount detection apparatus therefor and exhaust-gas converting apparatus A filter 2 for collecting PMs, a microwave transmitter 30 for emitting electromagnetic waves whose frequency is dozens of GHz-a few of THz onto the filter 2, a microwave receiver 31 for detecting an intensity of the electromagnetic waves ... | 02/21/2012 |
| 7999232 | Gas detector A gas detector (10) that is arranged to sense the concentration levels of target gases oxygen, methane, carbon monoxide, and hydrogen sulphide, within a gas sample from an environment surrounding the detector. The gas detector (10) comprises laser sour... | 08/16/2011 |
| 7919754 | Breath analyzer A system for the detection and analysis of at least one volatile substance in breath samples of a subject, including at least one source of infrared radiation adapted to the wavelength range of specific absorption peaks of said substances, a plurality of reflecting ... | 04/05/2011 |
| 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 separated to a plurality of light beams whose central frequencies correspo... | 09/01/2009 |
| 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 to be detected; and a detector for detecting radiation which has passe... | 06/02/2009 |
| 7449694 | Gas sensor A unique optical cavity for NDIR gas sensor module and test results for the CO2 concentration from 100 ppm to 2,000 ppm are disclosed. The proposed sensor module shows the maximum peak voltage at 500 ms pulse duration, however, it has a maximum fractional voltage ch... | 11/11/2008 |
| 7420171 | Gas sensors A gas sensor comprises a body on which is mounted an optical source and a detector means sensitive to light from the source. The body further comprises a channel arranged to admit gas, the channel comprising an elongated groove having reflective surfaces defining a ... | 09/02/2008 |
| 7358489 | Ultra low cost NDIR gas sensors The concentration of a gas species is detected by using a single beam NDIR gas sensor in which an infrared source element is driven at two different temperatures, a feed back loop senses an operation voltage of the source, a differential gain amplifier creates a hig... | 04/15/2008 |
| 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 emission gas sample, via fluorescence of the mercury within the gas sa... | 04/08/2008 |
| 7351954 | Method and apparatus for detecting gas concentration with infrared absorption characteristics A method and an apparatus for detecting gas concentration with infrared absorption characteristics have the function of automatic calibration. The function of automatic calibration is accomplished in such a manner that a reference chamber filled with CO2 ... | 04/01/2008 |
| 7342229 | Spectroscopic signal processing methodology A spectrometer energizes a solid state oscillator to generate a submillimeter wave and to sweep a predetermined band of frequency. The submillimeter wave is introduced into a sample cell that contains a gas, and frequency markers are electrically generated during th... | 03/11/2008 |
| 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, 2.711-2.786 μm, or 920-960 nm, passes through the natural gas to be detected... | 03/04/2008 |
| 7335885 | Ultra low power NDIR gas sensor fire detector A fire detector and method for generating an alarm signal in response to a fire uses an NDIR sensor to generate a detector signal based upon one or more absorption bands selected from the 15.1μ absorption band of CO2, the 6.27μ absorption band of H2O and the 4.67Î... | 02/26/2008 |
| 7329870 | Simple multi-channel NDIR gas sensors Concentrations of N gas species can be detected from a single beam NDIR gas sensor having a differential infrared source and an (N+1)-passband filter (having a neutral passband and N absorption passbands for N gases) mounted at a single infrared detector by driving ... | 02/12/2008 |
| 7326922 | Gas sensor with one point calibration System and method for calibrating a sensor comprises a detector capable of detecting electromagnetic radiation at least at a radiation wavelength of interest, an analyzer capable of determining concentration values in response to the detected radiation, and a calibr... | 02/05/2008 |
| 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, and capable of ON/OFF operations at high speed, and an infrared gas ana... | 01/29/2008 |
| 7324204 | Method and apparatus for trace gas detection In spectroscopic devices the sections of an optical measuring path from a light source to a measuring volume containing a measuring gas and from there to a measuring detector are often sealed off from the ambient atmosphere and purged with a purge gas such as dry ni... | 01/29/2008 |
| 7312452 | Mobile remote detection device and remote detection method for methane gas accumulations The invention relates to a mobile remote detection device for accumulations of methane, comprising an emitter device having a light source in order to generate light, the wavelength of said light source being tuned with the spectral signature of methane, whereby the... | 12/25/2007 |
| 7302289 | Readable probe array for use A disposable high density optically readable polydeoxynucleotide array with integral fluorescence excitation and fluorescence emission channels is described. The compact array size allows integration into several types of interventional devices such as catheters, gu... | 11/27/2007 |
| 7300408 | Spectroscopic breath analysis Methods and apparatus for the analysis of exhaled breath by spectroscopy are disclosed. An optical cavity containing the exhaled breath, typically comprising a pair of opposing high reflectivity mirrors, is used to implement a cavity enhanced absorbtion technique. P... | 11/27/2007 |
| 7301148 | Methods and systems for remote detection of gases Novel systems and methods for remotely detecting at least one constituent of a gas via infrared detection are provided. A system includes at least one extended source of broadband infrared radiation and a spectrally sensitive receiver positioned remotely from the so... | 11/27/2007 |
| 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 communicates with an airway of a patient. Gas from the sampling tube passes thr... | 11/13/2007 |
| 7288766 | Infrared gas detector and method of the same An infrared gas detector for detecting a density of a sample gas includes an infrared light sensor for detecting the density of the sample gas under an influence of water vapor based on an intensity of received infrared light of a specific wavelength, and a humidity... | 10/30/2007 |
| 7285782 | Infrared sensor with explosion-proof protection for gas metering appliances An infrared sensor for gas metering appliances consisting of a metering chamber with an infrared source and an infrared sensor. The metering chamber is connected to the atmosphere via an anti-dust and anti-damp filter. The metering chamber is arranged in a protectiv... | 10/23/2007 |
| 7282706 | Advanced optics for rapidly patterned laser profiles in analytical spectrometry The present invention is directed to a novel arrangement of optical devices for the rapid patterning of laser profiles used for desorption and/or ionization sources in analytical mass spectrometry. Specifically, the new optical arrangement provides for a user-define... | 10/16/2007 |
| 7279692 | Micromechanical infrared source A device for generating infrared radiation includes at least one heating element and at least one radiating element for irradiating the infrared radiation. The heating element is a micromechanical, two-dimensional heater structure. The heating element may be applied... | 10/09/2007 |
| 7268351 | Gas sensor module for the spectroscopic measurement of a gas concentration A gas sensor module for the spectroscopic measurement of at least one gas concentration, including at least: a spectroscopic gas sensor having a sensor chip which has a micropatterned measuring structure, and having an IR-transparent cap chip covering the measuring ... | 09/11/2007 |
| 7268945 | Short wavelength metrology imaging system An extreme ultraviolet (EUV) AIM tool for both the EUV actinic lithography and high-resolution imaging or inspection is described. This tool can be extended to lithography nodes beyond the 32 nanometer (nm) node covering other short wavelength radiation such as soft... | 09/11/2007 |
| 7259374 | Method for detecting a gas species using a super tube waveguide A method for detecting the concentration of one or more gas species by using infrared radiation emitted from one or more sources into a sample cell which is a hollow waveguide with multiple bends collectively greater than 180 degrees in three dimensions, the infrare... | 08/21/2007 |
| 7256706 | Hybrid well communication system A hybrid, hardwired and wireless well communication system having a fiber optical, electrical or other signal transmission conduit extending from the wellhead into the well and one or more wireless signal transducers that are located at a distance from the conduit a... | 08/14/2007 |
| 7253413 | Gas identification system A system for identifying a gas sample includes a canister, a docking station, a thermal desorption device, and a spectrometer. The canister includes a sorbent and a valve. The docking station is configured to removably engage the canister. When the canister is engag... | 08/07/2007 |
| 7253550 | Torsional electrostatic actuator Multiple drives are coupled together to cause rotation about a single axis by an arrangement in which two moveable electrode plates flank a fixed electrode plate such that the opposite direction rotations of the two moveable electrode plates are combined. To this en... | 08/07/2007 |
| 7248357 | Method and apparatus for optically measuring the heating value of a multi-component fuel gas using nir absorption spectroscopy A method and system for measuring heat energy of a combustible fluid in which light having wavelengths in the near-infrared is directed into a test cell containing the combustible fluid and portions of the light not absorbed by the combustible fluid and passing out ... | 07/24/2007 |
| 7244936 | Chemical species detection including a multisection laser for improved process monitoring A gas species monitoring system includes a laser system, where the laser system includes a multisection DBR laser, and a plurality of measurement points disposed at different locations within the system. The laser system is configured to selectively deliver a laser ... | 07/17/2007 |
| 7231111 | Tunable dispersion compensator A tunable dispersion compensator includes a collimating unit that collimates an incident light to output a parallel light, a parallel shifting unit that spatially shifts the parallel light from the collimating unit within a predetermined range, and an optical-path-l... | 06/12/2007 |
| 7223978 | Method for measuring gaseous species by derivation The invention relates to a method for measuring the quantity of chemical species contained in a high-temperature gas, and especially the quantity of CO and/or CO2 contained in a gas emitted from a metal treating furnace, especially a light-arc furnace (EA... | 05/29/2007 |
| 7218451 | Integrated optical multiplexer and demultiplexer Optical multiplexers and demultiplexers are provided. In one implementation an apparatus is provided. The apparatus includes a first laser diode pair, a second laser diode pair, a polarization rotator coupled between the first and the second laser diode pairs, and a... | 05/15/2007 |
