Electro-chemical sensor construction

Details Electro-chemical sensor construction Electro-chemical sensor construction

1978-06-22

1979-05-22

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2758

Patent

active

041558278

ABSTRACT:
An electro-chemical sensor to determine the oxygen content of exhaust gases, particularly from internal combustion engines. The sensor contains a tubular solid electrolyte closed at one end having a catalytically active layer on the outside to be exposed to the exhaust gas. The inside of said solid electrolyte tube is exposed to the ambient air and is provided with a contact portion arranged at the bottom of said solid electrolyte tube. The sensor contains an elongated axial center electrode which is pressured against the bottom (closed end) of the inside of the tubular solid electrolyte, preferably by means of a compression spring which may be mounted internal of said center electrode or external thereof. The central electrode comprises an insulating body having a heating element in the area which will be adjacent the portion of the solid electrolyte in contact with the exhaust gases. Additionally the central electrode also carries an electric lead to said contact portion. The contact portion may be attached to the central electrode.

REFERENCES:
patent: 3546086 (1970-12-01), Sayles
patent: 3871981 (1975-03-01), Flais et al.
patent: 3960692 (1976-06-01), Weyl et al.
patent: 4021326 (1977-05-01), Pollner et al.

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