Double-pass flue gas analyzer

Details Double-pass flue gas analyzer Double-pass flue gas analyzer

1983-06-17

1985-10-22

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250338, G01J 100

Patent

active

045490805

ABSTRACT:
A mixture of H.sub.2 O, CO.sub.2 and CO are measured in the same sample chamber by infrared radiation passing through the chamber and absorption filters passing a narrow band in their respective absorption curves to an infrared detector. Background radiation is zeroed by grounding the detector response when an opaque segment is disposed in the path. A reference filter detects drift which is automatically corrected.

REFERENCES:
patent: 3448267 (1969-06-01), Blythe et al.
patent: 3968367 (1976-07-01), Berg
patent: 4013260 (1977-03-01), McClatchie et al.
patent: 4233513 (1980-11-01), Elder et al.
patent: 4297577 (1981-10-01), Coe et al.

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