Solvent leak detecting sensor

Details Solvent leak detecting sensor Solvent leak detecting sensor

1989-07-14

1990-01-30

Askin, Laramie E.

Measuring and testing

With fluid pressure

Leakage

174 11R, 324664, 340605, G01M 316

Patent

active

048965278

ABSTRACT:
A solvent leak detecting sensor is provided comprising: (a) a first electrical conductor and a second electrical conductor installed on an electrically insulating substrate in the form of a detection circuit network, the conductors being exposed and separated from each other, (b) the exposed portions of the first conductor and second conductor being covered by a layer of an electrically insulating material which is both water-repellent and which is dissolvable by the solvent that is to be detected, and (c) a top layer covering the layer in "b", this top layer being both porous and electrically conductive. The layer which is both water-repellent and which is dissolvable by the solvent that is to be detected is preferably polyvinylchloride, and the top layer is preferably conductive carbon powder.

REFERENCES:
patent: 3600674 (1971-08-01), Roberts
patent: 4029889 (1977-06-01), Mizuochi
patent: 4206632 (1980-06-01), Suzuki

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