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Class Information
Number: 250/345
Name: Radiant energy > Invisible radiant energy responsive electric signalling > Infrared responsive > With means to transmission-test contained fluent material > Plural beam/detector pairs
Description: Subject matter wherein the source of infrared radiation forms two or more beams with at least one beam being transmitted through the contained material, and two or more electric signalling means, one responsive to radiation transmitted through the contained material and at least one in the path of one of the other beams.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7435964 |
Thermal sensor with increased sensitivity |
Oct. 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 |
Sep. 23, 2008 |
| 7345280 |
Measurement of steam quality using multiple broadband lasers |
Mar. 18, 2008 |
| 7244939 |
Gas sensor |
Jul. 17, 2007 |
| 7166842 |
Gas sensor arrangement with reduced settling time |
Jan. 23, 2007 |
| 6967322 |
Method and apparatus for performing rapid isotopic analysis via laser spectroscopy |
Nov. 22, 2005 |
| 6895269 |
Device for controlling equipment by using signals from a living body |
May. 17, 2005 |
| 6818895 |
Respiratory gas analyzer |
Nov. 16, 2004 |
| 6815681 |
Electron beam lithography apparatus using a patterned emitter |
Nov. 9, 2004 |
| 6791088 |
Infrared leak detector |
Sep. 14, 2004 |
| 6768126 |
Thermal image identification system |
Jul. 27, 2004 |
| 6762410 |
Analysis apparatus |
Jul. 13, 2004 |
| 6756591 |
Method and device for photothermal imaging tiny particles immersed in a given medium |
Jun. 29, 2004 |
| 6710873 |
Temperature-independent measurements of gas concentration |
Mar. 23, 2004 |
| 6694800 |
Gas analyzer using thermal detectors |
Feb. 24, 2004 |
| 6670613 |
System and method for spectral analysis |
Dec. 30, 2003 |
| 6661073 |
Semiconductor infrared detector and method for the production thereof |
Dec. 9, 2003 |
| 6635875 |
Infrared gas analyzer and method for operating said analyzer |
Oct. 21, 2003 |
| 6509567 |
Method and apparatus for detecting gases |
Jan. 21, 2003 |
| 6473705 |
System and method for direct non-intrusive measurement of corrected airflow |
Oct. 29, 2002 |
| 6469303 |
Non-dispersive infrared gas sensor |
Oct. 22, 2002 |
| 6442639 |
Docking station for environmental monitoring instruments |
Aug. 27, 2002 |
| 6369387 |
Gas analyzer |
Apr. 9, 2002 |
| 6277081 |
Anesthetic gas detection apparatus |
Aug. 21, 2001 |
| 6274870 |
Method for spectrometrically measuring isotopic gas and apparatus thereof |
Aug. 14, 2001 |
| 6191421 |
Gas analyzer using infrared radiation to determine the concentration of a target gas in a gaseous mixture |
Feb. 20, 2001 |
| 6166383 |
Non-dispersive infrared gas analyzer |
Dec. 26, 2000 |
| 6147351 |
Accurate measurement for the concentration of a gas component in a gas mixture, wherein other components influence the concentration analysis |
Nov. 14, 2000 |
| 6078049 |
Stable isotope analyzer |
Jun. 20, 2000 |
| 6064066 |
Bolometer autocalibration |
May. 16, 2000 |
| 6040914 |
Simple, low cost, laser absorption sensor system |
Mar. 21, 2000 |
| 6040915 |
Analysis method for gases and apparatus therefor |
Mar. 21, 2000 |
| 6037592 |
System for measuring gases dissolved in a liquid |
Mar. 14, 2000 |
| 5977546 |
Self normalizing radiant energy monitor and apparatus for gain independent material quantity measurements |
Nov. 2, 1999 |
| 5957858 |
Systems and methods for monitoring relative concentrations of different isotopic forms of a chemical species |
Sep. 28, 1999 |
| 5936250 |
Ultraviolet toxic gas point detector |
Aug. 10, 1999 |
| 5903006 |
Liquid concentration detecting apparatus |
May. 11, 1999 |
| 5900635 |
Correction of collision broadening in non-dispersive absorption measurement of gases |
May. 4, 1999 |
| 5813767 |
System and a method for monitoring combustion and pollutants in a thermal plant by means of laser diodes |
Sep. 29, 1998 |
| 5801384 |
Infrared gas spectrometer having sealed sections for improved safety |
Sep. 1, 1998 |
| 5773828 |
Gas analyzer |
Jun. 30, 1998 |
| 5760895 |
Optical monitor for water vapor concentration |
Jun. 2, 1998 |
| 5753916 |
Detector for infrafred gas analyzer |
May. 19, 1998 |
| 5747809 |
NDIR apparatus and method for measuring isotopic ratios in gaseous samples |
May. 5, 1998 |
| 5739538 |
Pneumatic infrared gas detector |
Apr. 14, 1998 |
| 5731583 |
Folded optical path gas analyzer with cylindrical chopper |
Mar. 24, 1998 |
| 5706212 |
Infrared ellipsometer/polarimeter system, method of calibration, and use thereof |
Jan. 6, 1998 |
| 5705816 |
Process and device for analyzing traces of impurities in a gas sample by means of a diode laser |
Jan. 6, 1998 |
| 5703365 |
Infrared spectroscopic analysis method for gases and device employing the method therein |
Dec. 30, 1997 |
| 5693945 |
Gas analyzer |
Dec. 2, 1997 |
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