Compensated infrared absorption sensor for carbon dioxide...

Details Compensated infrared absorption sensor for carbon dioxide... Compensated infrared absorption sensor for carbon dioxide...

2005-11-29

2005-11-29

Hannaher, Constantine (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06969857

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.

REFERENCES:
patent: 3940623 (1976-02-01), Hempowitz et al.
patent: 5436457 (1995-07-01), Tomita
patent: 5552841 (1996-09-01), Gallorini et al.
patent: 5646729 (1997-07-01), Koskinen et al.
patent: 9-264790 (1987-10-01), None
PCT International Search Report and Written Opinion for US04/00342, 13 pages not a publication.

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