Gas sensor

Details Gas sensor Gas sensor

1995-04-13

1996-06-18

Bell, Bruce F.

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

Using ion exchange resin

205793, 2057805, 204412, 204415, 204418, 204421, 204424, 204431, 204432, G01N 2726

Patent

active

055274463

ABSTRACT:
A gas sensor including an electrochemical sensor cell which has a anion-eange solid polymer electrolyte membrane with three attached electrodes is provided. The sensor cell contains no liquid electrolyte and is operated in the potentiostatic as well as the potentiodynamic modes to detect alkaline reactive gases, including vapors, such as hydrazines and derivatives thereof and ammonia. These sensor cells together with electronic circuitry, a pump and a power supply, fit into a compact, pocket-sized container to define the gas sensor of the invention which can detect traces of the above gases including 10 ppb of hydrazine and its derivatives and 10 ppm of ammonia. The invention includes the above gas sensor and the methods of operating same.

REFERENCES:
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patent: 4013522 (1977-03-01), Nischik et al.
patent: 4595486 (1986-06-01), Schmidt et al.
patent: 4666565 (1987-05-01), Dobson
patent: 4820386 (1989-04-01), LaConti et al.
patent: 4839020 (1989-06-01), Yamaguchi et al.
patent: 5344546 (1994-09-01), Kiesele et al.

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