Method and apparatus for detecting a constituent in an atmospher

Details Method and apparatus for detecting a constituent in an atmospher Method and apparatus for detecting a constituent in an atmospher

1976-11-18

1978-09-26

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

G01N 3106, G01N 3322

Patent

active

041160428

ABSTRACT:
A method and apparatus for detecting the presence of a particular constituent in a sampled atmosphere. The sampled atmosphere is drawn along two substantially identical flow paths, each path containing a detector. The flow of the particular constituent is delayed along one path only but not the other path to separate, in time, the signals from the two detectors. Means are provided for obtaining a resultant difference signal and for utilizing the difference signal to provide a positive identification of the presence of the particular constituent in the sampled atmosphere.

REFERENCES:
patent: 3263488 (1966-08-01), Martin
patent: 3386279 (1968-06-01), Sternberg
patent: 3430482 (1969-03-01), Draynieks et al.
patent: 3443415 (1969-05-01), Clardy
patent: 3942357 (1976-03-01), Jenkins
patent: 3997297 (1976-12-01), Jenkins et al.

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