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| Number | Title | Issue Date |
| 8143581 | Absorption biased NDIR gas sensing methodology An NDIR gas sensor and methodology use an absorption bias between signal and reference outputs to determine sample concentration of a gas being measured. The absorption bias is created by using a signal channel in a sample chamber with a signal path length that is g... | 03/27/2012 |
| 8097856 | Super-miniaturized NDIR gas sensor Two detector elements are optically isolated by having them mounted (die-attached) on the same header so that the thermal tracking of the detectors respectively for the signal and reference channels is close to ideal. Furthermore, such an optical isolation technique... | 01/17/2012 |
| 7435964 | Thermal sensor with increased sensitivity The invention provides a thermal sensor having a first and second temperature sensing elements each being formed on a thermally isolated table in a first substrate. ... | 10/14/2008 |
| 7427501 | System and method for optically monitoring the concentration of a gas, or the pressure, in a sample vial to detect sample growth A system and method employing infrared laser spectrography and dual wavelength modulation to monitor the concentration of a gas, such as oxygen or carbon dioxide, in the sample vial, or to monitor the pressure in the sample vial, to thus detect for microorganism gro... | 09/23/2008 |
| 7359804 | System and method for calibrating remote emissions sensing instruments A system and method is provided for obtaining calibration curves for CO and CO2 during laboratory calibration of one or more remote emissions sensing (RES) instruments, and for self-calibration of on-road RES instruments to compensate for changes in backg... | 04/15/2008 |
| 7352465 | Sample conditioning and environmental control techniques for gas sensor The present invention is a system and method of conditioning the sample and surrounding environment of an exhaled breath sensor. It includes (i) using a particular molecular sieve for a triple purpose: (a) maintaining the sensor at a constant relative humidity durin... | 04/01/2008 |
| 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 |
| 7345280 | Measurement of steam quality using multiple broadband lasers Determination of steam quality by passing one or more laser beams through steam in a steam chamber and directly determining a total number of vapor molecules and a total number of water molecules based on absorption of radiation in the one or more laser beams by the... | 03/18/2008 |
| 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 |
| 7304716 | Method for purging an optical lens By a unit for determining fractions of a substance in a gas or gas mixture, measurements are carried out on the gas or gas mixture for purging a lens in a projection apparatus for projecting patterns onto a substrate. The results of a first measurement on the gas fe... | 12/04/2007 |
| 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 |
| 7291114 | System and method of determining an individualized drug administration protocol A system and method for determining an individualized drug dosage is provided. The system includes a metabolic rate sensing means for sensing the metabolic rate of the individual. The system also includes a computing device having a processor, a memory, an input dev... | 11/06/2007 |
| 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 |
| 7276798 | Integral topside vacuum package An integrated vacuum package having an added volume on a perimeter within the perimeter of a bonding seal between two wafers. The added volume of space may be an etching of material from the inside surface of the top wafer. This wafer may have vent holes that may be... | 10/02/2007 |
| 7265369 | Method and system for detecting chemical substance A chemical detecting apparatus includes a substrate 10 for chemicals in gas-to-be-monitored to be adsorbed to, a substrate adsorption rate improving means 12 which enhances the adsorption of the chemical in the gas-to-be-monitored to the substrate, an ... | 09/04/2007 |
| 7262412 | Optically blocked reference pixels for focal plane arrays Methods for making optically blind reference pixels and systems employing the same. The reference pixels may be configured to be identical to, or substantially identical to, the active detector elements of a focal plane array assembly. The reference pixels may be co... | 08/28/2007 |
| 7255474 | Parallel infrared spectroscopy apparatus and method A library of material samples is provided in a condition suitable for imaging using infrared (IR) spectroscopy. The samples are provided to one or more detection cells, each of the cells including or containing a reflective surface. Preferably, for imaging, an energ... | 08/14/2007 |
| 7248370 | Method to reduce background noise in a spectrum An embodiment includes a method to reduce background noise in a spectrum. A further embodiment includes a method to reduce, by at least about two orders of magnitude, background noise in an experimental absorbance spectrum. Further, an embodiment includes a machine-... | 07/24/2007 |
| 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 |
| 7244939 | Gas sensor A gas sensor of the type that detects the presence of a specific gas by monitoring the absorption of optical radiation transmitted through a chamber containing a sample of gas under test comprises an optical source for emitting radiation therefrom and a detector sen... | 07/17/2007 |
| 7240535 | Method and apparatus for gas measurement at substantially constant pressure A system which enables the presentation of alternating gas samples to a gas sensor in a detection zone without substantial change of the sample pressure at the sensor in the zone, whereby pressure variations that can produce unwanted sensor signals are mitigated; al... | 07/10/2007 |
| 7227642 | Absorbance monitor This invention relates to a multi-component absorbance monitor, and the object is to provide a general-purpose and highly accurate compact absorbance monitor. Disclosed is an absorbance monitor including a light source, a sample cell and a plurality of detectors as ... | 06/05/2007 |
| 7217121 | Method and apparatus for improved process control in combustion applications This invention relates to a method and apparatus for improved process control in combustion applications, and particularly those relating to the steelmaking industry. An apparatus is provided for process control in a combustion application comprising a laser to tran... | 05/15/2007 |
| 7213444 | Optoacoustic gas sensor An optoacoustic sensor for detecting one or more target gases includes a body featuring halves containing measurement cells. Each measurement cell is in communication with a light source and a microphone as well as the ambient atmosphere. Evaluation and control elec... | 05/08/2007 |
| 7183945 | Method and system for video capture of vehicle information A system for collecting and managing information relating to vehicles includes a digital image collection system positioned to capture an image of a vehicle travelling along a roadway. The captured images are delivered to a computer program memory via a communicatio... | 02/27/2007 |
| 7180595 | Gas detection method and gas detector device A gas detector device comprises at least a VCSEL source (34, 36) and at least a light sensor (54, 56) for detecting a light beam (50, 52) having passed through a sample chamber (48) containing a given gas to be detected. The sensor is a p... | 02/20/2007 |
| 7166842 | Gas sensor arrangement with reduced settling time A gas sensor arrangement for detecting the presence or concentration of an analyte in a measuring gas comprises a gas measuring chamber having an inlet for receiving the measuring gas. A measuring radiation source is arranged in the gas measuring chamber. The measur... | 01/23/2007 |
| 7151605 | Methodology for providing good data at all wavelengths over a spectroscopic range Disclosed is methodology for obtaining data of improved precision, including detection and replacement of data determined to be suspect to provide good data over a spectroscopic range of wavelengths. ... | 12/19/2006 |
| 7132660 | Mid infra red analysis A method of quantitative measurement of fat in a liquid sample by an infrared attenuated technique is disclosed. The fat is present in the form of an emulsion of particles causing Christiansen's effect, i.e. the combined effect of light-scattering and anomalous disp... | 11/07/2006 |
| 7105821 | Thermally stabilized radiation detector utilizing temperature controlled radiation filter A radiation detector 10 has a base 12 and a window 16 that define a vacuum chamber 20. Within the vacuum chamber 20 is a temperature controlled filter 32 and a focal plane array (FPA) 22 defining a gap h therebetween.... | 09/12/2006 |
| 7084796 | Cross-talk linearity connection An array of photoconductive elements comprises an array of radiation detectors; an electrical lead connected to the array of radiation detectors; at least one amplifier receptive of an output signal of the array of radiation detectors; a summation device receptive o... | 08/01/2006 |
| 7075629 | High temperature pyrometer A pyrometer having at least two detectors and at least two band-pass filters near each to limit the detectable wavelength band emitted by an object, and a device to exchange their filters to eliminate detector output ratio errors. The detector output ratio is then u... | 07/11/2006 |
| 7063667 | Isotopic gas analyzer 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 i... | 06/20/2006 |
| 7044637 | Temperature measuring apparatus A temperature measurement apparatus allows for accurate temperature measurement in both the sun and the shade using two different thermal sensors. A black sensor has an infrared absorbent surface and a white sensor has an infrared reflecting surface. Using the measu... | 05/16/2006 |
| 7034943 | Gas sensors The present invention relates to a device for accomplishing noise reduction in a photoacoustic gas detector using a sound damping element and/or a background or reference microphone where a preferably larger external volume that acts as a sound damping element (SDE)... | 04/25/2006 |
| 7034302 | Optical steam quality measurement system and method An optical measurement system is presented that offers precision on-line monitoring of the quality of steam. Multiple wavelengths of radiant energy are passed through the steam from an emitter to a detector. By comparing the amount of radiant energy absorbed by the ... | 04/25/2006 |
| 7034304 | Chamber for gas detector A gas sensor, which could be a sensor of combustible gases, incorporates a diffusion chamber having symmetrical sensing and reference portions. A common source emits infrared-type radiant energy symmetrically into the two portions. Each portion incorporates a curved... | 04/25/2006 |
| 7027924 | Detecting natural gas pipeline failures A method for detecting failures in a natural gas returning radiation from the pipeline; determining that there is a failure in the pipeline when the spectral or thermal signature indicates that there is a plume of escaping natural gas from the pipeline emitted from ... | 04/11/2006 |
| 7022993 | Infrared leak detector Leak detector using infrared for identifying the presence and concentration of a selected gas. For detection, radiation from an infrared emitter penetrates the sample, which is analyzed spectrally, and results in a wave length-specific signal being generated at the ... | 04/04/2006 |
| 7019675 | System and method for minimizing crosstalk between signals of photoconductive elements An array of photoconductive elements comprises an array of radiation detectors; an electrical lead connected to the array of radiation detectors; at least one amplifier receptive of an output signal of the array of radiation detectors; a summation device receptive o... | 03/28/2006 |
