Oxygen partial pressure sensor

Details Oxygen partial pressure sensor Oxygen partial pressure sensor

1993-02-17

1994-09-06

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204424, 204426, 204428, 204429, G01N 27417

Patent

active

053445490

ABSTRACT:
A method for detecting oxygen partial pressure and an oxygen partial pressure sensor are provided. The method for measuring oxygen partial pressure includes contacting oxygen to a solid oxide electrolyte and measuring the subsequent change in electrical conductivity of the solid oxide electrolyte. A solid oxide electrolyte is utilized that contacts both a porous electrode and a nonporous electrode. The electrical conductivity of the solid oxide electrolyte is affected when oxygen from an exhaust stream permeates through the porous electrode to establish an equilibrium of oxygen anions in the electrolyte, thereby displacing electrons throughout the electrolyte to form an electron gradient. By adapting the two electrodes to sense a voltage potential between them, the change in electrolyte conductivity due to oxygen presence can be measured.

REFERENCES:
patent: 4152234 (1979-05-01), Pollner
patent: 4276142 (1981-06-01), Topp et al.
patent: 4277323 (1981-07-01), Muller et al.
patent: 4505806 (1985-03-01), Yamada
patent: 4879016 (1989-11-01), Joshi
patent: 4947125 (1990-08-01), De Pous

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