Apparatus and a method for detecting and measuring trace gases i

Details Apparatus and a method for detecting and measuring trace gases i Apparatus and a method for detecting and measuring trace gases i

1977-06-23

1978-10-10

Dixon, Harold A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250384, G01T 118

Patent

active

041198514

ABSTRACT:
Method and apparatus for detecting the presence of very small concentrations of certain vapors and gases in air or other gaseous backgrounds. A gas sample is ionized by a source of ionizing radiation. The sample of ionized gas is then directed through a recombination region where ions are selectively recombined. The ionized gas is further directed through a drift region where the ions are subjected to a drift potential and separated into different groups, depending upon their mobilities. In an alternate embodiment, the ionized gas is first directed through a drift region, followed by a recombination region.

REFERENCES:
patent: 3573460 (1971-04-01), Skala
patent: 3835328 (1974-09-01), Harris et al.
patent: 3853750 (1974-12-01), Volsy
patent: 3892968 (1975-07-01), Lovelock

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