Electrochemical sensor construction

Details Electrochemical sensor construction Electrochemical sensor construction

1975-12-23

1977-04-26

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204 1S, 60276, 123119E, G01N 2746

Patent

active

040199746

ABSTRACT:
To provide for insulation between the conductors of a solid electrolyte ion-conductive oxygen measuring tube and a steel housing thereof, for introduction into the exhaust system of an automotive vehicle, the housing is formed with a shoulder against which a ceramic ring is seated, the tube passing through the ring, and likewise being formed with a shoulder seating against the ring. The outer conductor along the tube extends beyond the ring. A resilient electrically conductive mass such as graphite is packed around the tube, and spaced from the inner walls of the housing by a resilient mass of an insulating powder, such as talcum. The tube is held in position by a second insulating ring, the aperture of which is lined with a metallic sleeve contacting the electrically conductive powder and providing a contact connection to a terminal located in an end insulator secured to the housing; the interior of the tube is likewise connected to another terminal located in the insulator.

REFERENCES:
patent: 3835012 (1974-09-01), Hemak
patent: 3841987 (1974-10-01), Friese et al.
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3847778 (1974-11-01), Riddel
patent: 3891529 (1975-06-01), Beesch

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