Correction of two beam photometer for fluid analysis

Details Correction of two beam photometer for fluid analysis Correction of two beam photometer for fluid analysis

1974-11-29

1976-02-10

Grimm, Siegfried H.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250351, 356 51, 356206, 356222, G01N 2126, G01N 2136

Patent

active

039379620

ABSTRACT:
A two infrared beam gas analyzer, with sample and reference paths and radiation chopper has two absorption cells as detectors wherein the pressures are compared in a first diaphragm capacitor and the sum with parameter modification by operation of pneumatic inpedances is formed in a second diaphragm capacitor. The ratio of the two capacitor outputs constitutes the output of the system. A compact unitary construction is described in detail including the detector chambers and one capacitor in a body serving as mounting element for the second capacitor with a frit like element interposed as pneumatic inpedances and rotational adjustment of that second capacitor as a whole results in parameter adjustment.

REFERENCES:
patent: 3700891 (1972-10-01), Luft
patent: 3725702 (1973-04-01), Schaefer

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