Reduce damage caused by water leaks with this Supervised Surface Water Sensor. Compatible with the EnviroAlert EA200, 400 or 800 and with the WaterBug WB-800, the Supervised Surface Sensor is perfect for use in laundry rooms, basements, near sump pumps, drain areas, computer rooms, document storage areas, warehouse, A/C condenser trays - anywhere there is a risk of water leakage. In addition to detecting water, this supervised sensor will allow the control panel to alarm if the sensor line becomes disconnected. Features a stable surface mount design. Includes 15 foot (4.5 m) long cable lead. Small size: 3" x 2" x .88"