Low molecular weight organic liquid detection sensor in the shap

Details Low molecular weight organic liquid detection sensor in the shap Low molecular weight organic liquid detection sensor in the shap

1993-03-02

1995-01-03

Strecker, Gerard R.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324696, 324698, 340605, 200 6104, 174 11R, 73 40, G01R 2722, G01N 2707, G01M 316

Patent

active

053789954

ABSTRACT:
A low molecular weight organic liquid detection sensor which is a wire body formed by coating a core material with a conductive layer made of a substantially non-crosslinked material having a Shore A hardness not more than 70 which is mainly composed of thermoplastic elastomer and conductive carbon, the conductive layer varying in its electric resistance upon contact with a low molecular weight organic liquid. The sensor of the invention permits secured mechanical strength, its easy installation in a narrow conduit or over a wide area, and highly sensitive sensing of a low molecular weight organic liquid in the longitudinal direction. The detector of the invention comprises a sensor having the above structure, preferably a porous body which houses and protects the sensor, a means which is connected to this sensor and detects electric resistance variation, and a means for transmitting this electric resistance variation as an alarm signal, and the detector can be used in the presence of underground water, which in turn permits use of existing liquid-leakage detection holes and installation at low costs.

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patent: 5173684 (1992-12-01), Ijiri et al.
patent: 5177996 (1993-01-01), Sahakian

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