Gas sensor

Details Gas sensor Gas sensor

1992-01-23

1993-08-10

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204422, 204424, 204431, G01N 2726

Patent

active

052345670

ABSTRACT:
An electrochemical gas sensor for sensing an alkaline gas such as ammonia. The sensor comprises at least sensing and counter electrodes provided in a cell containing an aqueous electrolyte, the cell further including a diffusion barrier to restrict the access of gas to the cell, and a chemical species with which the gas reacts in use to form a product which is more electrochemically active than the gas. The chemical species is one of iodine, Nesslers reagent and a solution of manganous and silver nitrates.

REFERENCES:
patent: 3764269 (1973-10-01), Oldham
patent: 3821090 (1974-06-01), Topol et al.
patent: 4474648 (1984-10-01), Tantrum et al.
patent: 4568445 (1986-02-01), Cates et al.
patent: 4842697 (1989-06-01), Driscoll et al.
patent: 5076904 (1991-12-01), Kiesele et al.
Miller et al, "A Versatile Electrochemical Monitor For Air-Quality Measurements", J. Air Pollution Control Assn., Jul. 1971, vol. 21, No. 7, pp. 414-417.

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