Twisted leak detection cable
View Patent ↗Disclosed is a leak detection cable that has an outer jacket layer and a four wire construction in a flat wire configuration that is twisted in a helix. Detection cables are disposed on the exterior surface adjacent openings of the jacket to allow for detection of aqueous fluids. The wire is twisted in a helix to allow adjacent detector wires to easily detect aqueous fluids. Disparate materials are used for the jacket and the coatings of the wires, to allow the jacket to be easily removed from the wires without affecting the integrity of the coatings of the wires. The four flat wire configuration is sized and spaced for easy connection to an insulation displacement connector.
1. A method for making a leak detection cable comprising:
extruding a conductive coating, that comprises a preselected conductive plastic, around at least one detector wire to form at least one detector conductor;
extruding a non-conductive coating that comprises a preselected non-conductive plastic around at least one feedback wire to form at least one feedback conductor;
extruding a jacket around said at least one detector conductor and said at least one feedback conductor so that said at least one feedback conductor is substantially surrounded by said jacket, and said at least one detector conductor is partially surrounded by said jacket by an amount sufficient to hold said at least one detector conductor in said jacket and provide an opening adjacent to said at least one detector conductor that exposes said at least one detector conductor to an exterior environment outside of said jacket to allow aqueous fluids outside of said jacket to directly contact said at least one detector conductor, said jacket comprising a plastic jacket material that is dissimilar to, and has low adhesion with, said preselected conductive plastic and said preselected non-conductive plastic so that said jacket can be easily removed from said detector conductor;
twisting said jacket in a helix so that said at least one detector conductor is sequentially exposed along a linear surface of said leak detection cable;
wherein said detector conductor and said feedback conductor are placed in a plane with a substantially equal center to center spacing required for use of an insulation displacement connector.
2. The method of claim 1 further comprising:
providing a non-conductive, liquid pervious layer that surrounds said conductive coating around at least one detector conductor.