Water Leak Sensors are used in a variety applications to protect against costly water damaged caused by leaking or burst pipes, sump overflow, leaky hoses, defective or damaged appliances. Once the water sensor detects water it will sound an audible alarm or send a signal to the alarm system to which it is attached. Some water leak sensors have outputs specifically designed to allow connection to a voice dialer, cellular text alert or an alarm system. Other water detectors are stand alone units that emit a loud warning siren when a leak has been detected.