Oxygen sensor

Details Oxygen sensor Oxygen sensor

1991-12-30

1993-12-21

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204427, 204428, 204429, G01N 27417

Patent

active

052718166

ABSTRACT:
An oxygen sensor includes a hollow tubular element made of a solid electrolyte capable of conducting oxygen ions. The inner surface of the element is exposed to the atmosphere, and the outer surface thereof is exposed to an exhaust gas of which the oxygen concentration is to be detected. First and second electrodes are arranged on the inner and outer surfaces of the element, respectively. The second electrode is provided with a coating which contains a catalyst for causing and promoting a water gas reaction of carbon monoxide contained in the exhaust gas approaching the second electrode. Alternatively, a large number of pellets containing the catalyst are charged in the space between the tubular element and a protective tube surrounding the element.

REFERENCES:
patent: 2709159 (1955-05-01), Daussat
patent: 4132615 (1979-01-01), Linder et al.
patent: 4151060 (1979-04-01), Isenberg
patent: 4199425 (1980-04-01), Sinkevitch
patent: 4212273 (1980-07-01), Maruoka
patent: 4233142 (1980-11-01), Rohr et al.
patent: 4362605 (1982-12-01), Bozon et al.
patent: 4540563 (1985-09-01), Chinchen
patent: 4552750 (1985-11-01), van der Wal et al.
patent: 4598062 (1986-07-01), Schneider et al.

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