The wet switch flood detector is a solid state control designed to help prevent flooding, damage to carpets, walls, furniture, ceilings, etc. It now has a built-in test and reset button for easier installation. It turns the system off when moisture due to condensate or drain leaks is detected. One or two drops will cause Wet Switch to turn off a unit, alerting a serviceman to a moisture problem. A lit LED indicates the Wet Switch is activated and has turned the unit off. Re-set simply by drying the absorbent pad with a paper towel and pressing the reset switch. Connects to 24 VAC. More than one unit may be connected to a system. 2 amp contact rating. Simple 5 wire installation.