Level sensor which has high signal gain and can be used for flui

Details Level sensor which has high signal gain and can be used for flui Level sensor which has high signal gain and can be used for flui

1990-05-11

1992-08-25

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 22R, 338 27, 338 86, 338 94, H01C 710

Patent

active

051422670

ABSTRACT:
A PTC-resistor which is a temperature dependent electrical thermistor of semiconductor ferro-electric ceramic which is provided with power leads and serves as a sensor element is directly fused into glass. The power leads are welded to metal coatings formed on the PTC-resistor which are stable at the temperature occurring when the PTC-resistor is fused. The metal coatings are made of aluminum which are formed by aluminum silk screened metallizations which have a thickness of 50 .mu.m or more.

REFERENCES:
patent: 3863210 (1975-01-01), Roland et al.
patent: 3896409 (1975-07-01), Micheli et al.
patent: 4276536 (1981-06-01), Wisnia
patent: 4647895 (1987-03-01), Howng
Siemens Zeitschrift, pp. 138-145, Feb. 1965.

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