Nitrogen dioxide sensing element and method of sensing the prese

Details Nitrogen dioxide sensing element and method of sensing the prese Nitrogen dioxide sensing element and method of sensing the prese

1977-03-07

1979-03-06

Ruehl, Charles A.

Measuring and testing

Gas analysis

Gas chromatography

338 34, G01N 2712, H01C 1300

Patent

active

041424000

ABSTRACT:
An element for sensing the presence of nitrogen dioxide gas in the environment. The element comprises a film of a pyrolyzed polyaromatic polymer having semi-conductive properties which is mounted on an electrically non-conductive base. Electrical leads are attached at spaced locations to the film and are connected in an electrical circuit with a signalling or control mechanism. The presence of nitrogen dioxide gas will cause a change in the electrical characteristics of the film to thereby activate the mechanism. A heating element can be associated with the base to insure constant temperature and humidity conditions.

REFERENCES:
patent: 3045198 (1962-07-01), Dolan et al.
patent: 3645999 (1972-02-01), Byrd
patent: 3695848 (1972-10-01), Taguchi
patent: 3891958 (1975-06-01), Wakabayashi

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