Oxygen sensor with heater

Details Oxygen sensor with heater Oxygen sensor with heater

1984-04-27

1985-07-09

Simmons, David

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204429, 219541, G01N 2746

Patent

active

045280860

ABSTRACT:
An oxygen sensor having a bar-shaped heater inserted in an elongate bore formed in a tubular body of solid electrolyte which has porous platinum electrodes on its inner and outer surfaces and which is supported by a housing such that its closed end portion is exposed to exhaust gas and such that the elongate bore is gas-tight with respect to the exhaust gas. The bar-shaped heater comprises a heating resistor having a positive temperature coefficient, a ceramic body carrying the heating resistor so as to embed the latter, and a pair of lead wires. The ceramic body has on its periphery a pair of terminal pads connected to the heating resistor. The ends of the lead wires are brazed to the terminal pads with a brazing material containing silver. The ceramic body further has a pair of equipotential members disposed outwardly of the pair of terminal pads to enclose at least portions of the peripheries of the pads which are opposite to each other.

REFERENCES:
patent: 4339320 (1982-07-01), Friese et al.
patent: 4383906 (1983-05-01), Sano et al.

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