Sensors for detecting and locating liquid leaks

A sensor cable for detecting liquid leakage which comprises:

• a first, second, and third electrical conductor, each in substantially parallel relation to each other, said first conductor being a core conductor, said second and third conductors having a fluid-permeable construction with permits passage of liquid chemicals,
• a first insulation layer located between the first and second conductors, said first insulation being porous enough to permit passage of liquid chemicals,
• a second insulation layer adjacent to and covering said second conductor, said second insulation being porous enough to permit passage of liquid chemicals, said second insulation being hydrophobic so that it is impermable to liquid water,
• a third insulation layer positioned between said second insulation layer and said third conductor, said third insulation layer being porous enough to permit passage of liquid chemicals, and being water permeable, and
• a protective insulation cover that is porous enough to permit passage of liquid chemicals and water, said covering comprising the outer portion of the cable.