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Compensated infrared absorption sensor for carbon dioxide and other infrared absorbing gases

United States Patent

November 29, 2005
View the Complete Patent at the US Patent & Trademark Office
A gas sensor, whose chamber uses filters and choppers in either a semicircular geometry or annular geometry, and incorporates separate infrared radiation filters and optical choppers. This configuration facilitates the use of a single infrared radiation source and a single detector for infrared measurements at two wavelengths, such that measurement errors may be compensated.
Owen; Thomas E. (Helotes, TX)
Southwest Research Institute (San Antonio, TX), Gas Research Institute (Des Plaines, IL)
10/ 753,614
January 8, 2004
GOVERNMENT RIGHTS CLAUSE The U.S. Government has a paid-up license in this invention and the right in certain circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. DE-FC21-96MC33033 for the U.S. Department of Energy.