Gas analyzer and gas analyzing method

Details Gas analyzer and gas analyzing method Gas analyzer and gas analyzing method

1978-10-11

1980-04-29

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01J 100

Patent

active

042007917

ABSTRACT:
A gas analyzer and gas analyzing method are described of the non-dispersive infrared type wherein infrared energy is passed through a sample cell containing an unknown mixture of gas. The infrared energy passing through the cell is received by a detector and an electrical signal is produced representative thereof. A rotary filter wheel positions at least one filter in the path of the infrared energy, resulting in a pulsating detector output. The electrical signal is processed to produce an output indicating the concentration of the constituents of the gas mixture in the sample cell. Synchronization with the processed electrical signal is obtained by deriving synchronizing pulses directly from the electrical signal produced by the detector.

REFERENCES:
patent: 3926522 (1975-12-01), Andreotti
patent: 3953734 (1976-04-01), Dimeff
patent: 4013260 (1977-03-01), McClatchie et al.

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