Partial pressure of oxygen sensor-I

Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting

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73 27R, 422 98, H01L 700

Patent

active

044145314

ABSTRACT:
A partial pressure of oxygen sensor which finds utility when inserted into an exhaust system of a hydrocarbon fuel burning device. The oxygen sensor includes a mounting body threaded on one end for securement to the exhaust system and having a conical configured bore extending along a central axis thereof and having its smaller end at the threaded end of the mounting body. An elongated heated sensing element is also provided which includes a ceramic support, a resistance heater element, and a titania dioxide sensor element bonded to a leading portion of the ceramic support. A plurality of electrically conductive paths are provided on the ceramic support for the elements contained thereon. An insulator body having a conical configuration sandwiches the heated sensing element therewithin. The insulator body is mounted in the conical configured bore of the mounting body in a manner that the heated sensing element projects a fixed distance beyond the threaded end of the mounting body. A protection device is provided over the leading portion of the heated sensing element. Electrical connections are made by means of electrical lead wires at the rear end of the mounting body to the circuit paths on the ceramic support. Further structure is provided for supporting and sealing the electrical lead wires in a manner that the electrical lead wires may be connected to a suitable connector, whereby the heated sensing element can be connected to a source of voltage and the titania dioxide sensing element to a sensing circuit.

REFERENCES:
patent: 4001758 (1977-01-01), Esper et al.
patent: 4193965 (1980-03-01), Cullingford et al.
patent: 4243968 (1981-01-01), Scott
patent: 4308518 (1981-12-01), Hattori et al.

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