Compensated infrared absorption sensor for carbon dioxide and other infrared absorbing gases
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United States of America Patent
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Nov 29, 2005
Grant Date -
Oct 21, 2004
app pub date -
Jan 8, 2004
filing date -
Jan 10, 2003
priority date (Note) -
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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.
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