Fluid leakage detecting element

Details Fluid leakage detecting element Fluid leakage detecting element

1983-01-19

1985-02-19

Envall, Jr., Roy N.

Electrical resistors

Resistance value responsive to a condition

338 7, 338 9, 338292, 338307, 374 4, 374 5, H01C 700, H01C 1012, G01N 2572

Patent

active

045008655

ABSTRACT:
A fluid leakage detecting element comprises a heat generating resistive member and a temperature compensating resistive member disposed on a substrate. Each of the resistive members is prepared in the form of a paste of a metal which has a high temperature coefficient and a high thermal conductivity and whose melting point is higher than the baking temperature of the substrate. These resistive members are printed in thick film form on the substrate which is sufficiently electrical insulating and has a high thermal conductivity.

REFERENCES:
patent: 3266661 (1966-08-01), Dates
patent: 3665756 (1972-05-01), Russell
patent: 4286377 (1981-09-01), Hurko et al.
Arcus et al., "Leak Detectors for Chemical Distribution System", IBM Tech. Disc., vol. 18, No. 10, pp. 3271-3272, Mar. 1976.
Wyatt, R. F., "The Design of Thick Film Resistors", Progress in Miniaturization, May 1970.

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