Nondispersive infrared gas analyzer

Details Nondispersive infrared gas analyzer Nondispersive infrared gas analyzer

1980-04-30

1981-07-28

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, G01N 2126

Patent

active

042812488

ABSTRACT:
The cross-sensitivity of a two-beam infrared gas analyzer is reduced by using two differently long cells for the sample gas in the two beam paths. The path with the short sample gas cell is intercepted by a detector cell having highly absorbing wall while the detector cell in the other path is highly reflective, e.g., made of gold. The two detector cells are interconnected by a differential pressure chamber with capacitive pickup.

REFERENCES:
patent: 3925667 (1975-12-01), Staab
patent: 3937962 (1976-02-01), Faulhaber et al.
patent: 3970387 (1976-07-01), Faulhaber et al.
patent: 4156812 (1979-05-01), Staab
patent: 4180732 (1979-12-01), Fabinski et al.

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