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Compensated Infrared Absorption Sensor for Carbon Dioxide and Other Infrared Absorbing Gases

Abstract: 

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.

Patent Number: 
6,969,857
Date Of Issue: 
11/29/2005
Inventors: 

Thomas E. Owen