Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1989-11-06
1990-12-25
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
4271263, G01N 27409
Patent
active
049800426
ABSTRACT:
An oxygen sensor comprising a hollow cylindrical member closed at one end but open at the other to admit a reference gas. There is at least one radial through-hole in the hollow cylindrical member. An oxygen-ion conductive solid electrolyte later has at least one pair of electrodes on its opposite sides. The electrolyte layer is wrapped around the hollow cylindrical member with the electrode on its inner side facing the through hole. In other embodiments, an oxygen sensor is provided which is very insensitive to the direction of flow of the gas to be analyzed. The electrodes of the sensor are spaced at substantially equal intervals on the circumference of a cylindrical solid electrolyte layer in registry with through-holes formed in a hollow tubular member surrounded by the electrolyte layer. A heating unit may be formed on either the inner or outer surface of the solid electrolyte layer.
REFERENCES:
patent: 4455214 (1984-06-01), Isenberg
Aoyama Toshihiko
Kawachi Yoshitake
Minoha Ken
Shiomi Haruhisa
Kaplan G. L.
NGK Spark Plug Co. Ltd.
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