W. L. Gore & Associates, Inc.

Jack A Sahakian

John C Hostler

Samuel Berkman

A leak detection cable for detecting aqueous based liquids that contain a surfactant is composed of an insulated wire conductor (1 and 2) wrapped with a water resistant yarn (3) and a braided second conductor (4).

Electrical cable leak detection system

A leak detection cable for selectively sensing liquid organic chemicals is not affected by liquid water or water vapor. The cable includes a first electrical conductor and a second electrical conductor disposed in a coaxial or twin lead configuration. In the coaxial configuration, a porous insulation layer is disposed between the conductors, and a vapor-proof insulation layer surrounds the conductors. In the twin lead configuration, the conductors are encapsulated in a porous insulation layer which is surrounded by a vapor-proof insulation layer. The vapor-proof insulation allows passage of liquid organic chemicals while excluding water vapors and liquid water. The vapor-proof insulation includes a microporous insulation such as expanded, microporous polytetrafluoroethylene (ePTFE) which has been impregnated with a wax which is soluble in the liquid organic chemicals being detected.

Liquid leak detection cable

Coaxial electric cable and simplified process for making it, wherein large gauge center conductor is wrapped with extruded strands of porous expanded polytetrafluoroethylene, drawn through a die to reduce diameter and voids, tape-wrapped with porous expanded polytetrafluoroethylene, sintered, and shielding and extruded jacketing applied.

Large gauge insulated conductor and coaxial cable, and process for their

A sensor cable for detecting and locating liquid chemicals, especially hydrocarbons, and/or water leaks without interruption of the system, wherein two or three conductors and appropriate insulation are arranged in a configuration that provides circuits for detecting and locating liquid chemicals and for detecting and locating liquid water.

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Phoenix, AZ, United States of America

Jack A Sahakian