Non-dispersive infrared analyzer

Details Non-dispersive infrared analyzer Non-dispersive infrared analyzer

1982-10-29

1985-04-30

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250344, G01J 100

Patent

active

045146357

ABSTRACT:
A non-dispersive infrared analyzer for determining the concentration of two components of a sample fluid. A zero fluid and a sample fluid are alternately supplied to two cells. Two pneumatic detectors are respectively optically arranged in series with two light sources such that the two cells are respectively sandwiched between the two light sources and the two detectors. At least one filter whose passband corresponds to the absorbtion bands of one of the two components of the sample fluid is located directly adjacent to and optically in series with at least one of the two cells.

REFERENCES:
patent: 4320297 (1982-03-01), Cederstrand et al.
patent: 4336453 (1982-06-01), Imaki et al.
patent: 4393304 (1983-07-01), Ishida et al.

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