Infrared gas analyzer

Details Infrared gas analyzer Infrared gas analyzer

1994-09-23

1995-11-21

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250345, G01N 2161

Patent

active

054689627

ABSTRACT:
An infrared gas analyzer, of compact and inexpensive design, has improved detection sensitivity. The infrared gas analyzer includes an infrared radiation source, a measuring cell, a reference cell, and a detector. The detector includes two detector cells in which the same species of gas, as the gas to be analyzed, is enclosed. A gas flow channel connects the detector cells to each other. Two thermal sensors are disposed in the gas flow channel, each of which further includes pairs of thermo-elements. The thermo-elements are arranged in such close proximity to each other, as to originate a thermal coupling between the pairing elements, and the thermo-element pairs are separated by a distance across which thermal coupling between the thermo-element pairs becomes insignificant. The detector detects, by the thermal sensors, a gas flow indicative of infrared absorption intensity difference between the measuring and reference cells.

REFERENCES:
patent: 4772790 (1988-09-01), Aldridge

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