Apparatus and method for measuring gas concentrations

Details Apparatus and method for measuring gas concentrations Apparatus and method for measuring gas concentrations

1991-07-18

1992-11-03

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503385, 250345, 2504931, H01S 322, G01N 2135

Patent

active

051608430

ABSTRACT:
An apparatus and method measures the concentration of a gas. The apparatus comprises a radiation source (70) for emitting radiation onto the gas (79) to be measured, whereby the radiation source (70) is comprised of an anode (4) and a cathode (9), and as an emitting fill gas the same as the gas (79) to be measured; and a radiation detector (74) with which the radiation transmitted through the gas (79) to be measured can be detected. The cathode (9) functions as an electron emitter, and between the anode (4) and the cathode is connected such a low operating voltage that does not cause ionization or essential dissociation of the emitting gas. The design provides an approximate temperature tracking of the radiation source with the ambient temperature.

REFERENCES:
patent: 3725701 (1973-04-01), Link
patent: 3971968 (1976-07-01), Bachmann et al.
patent: 4274063 (1981-06-01), Javan
patent: 4721885 (1988-01-01), Brodie
patent: 4755675 (1988-07-01), Rosenfeld et al.
patent: 4780613 (1988-10-01), Bernstein et al.
patent: 4967089 (1990-10-01), Reilly et al.

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