Water leak detection system is used to detect water, chemical, oil and refrigerant gas leaks. The heart of the Water leak detection system is the water leak detector cable. The cable itself is the sensor. Every centimeter of rugged, fire rated cable is sensitive to water and when water comes into contact with the cable, even a few milliliters, the system is able to detect the leak AND report the location. The detection cable can be installed in any length from a few meters in a drip tray to hundreds of meters around the perimeter of an office area. Typical applications in office buildings include the monitoring of fan-coil units around the edge of the building office floors, detectors surrounding the central utility core on each floor of the building and dedicated monitoring of leaks in electrical switch gear rooms, server rooms, network communications, etc.