Get advance notice of potentially hazardous water leaks with a system that alerts you when leaking water is detected. The WaterBug Leak Detection System can be used with virtually any security/home automation system that accepts a dry contact closure as a signal, including X10-based systems, Sensaphone systems, and more. This AC-powered system has normally-open or normally-closed contacts and requires a power supply (sold separately). The WaterBug Leak Detection System comes with one surface sensor. You can also add up to 5 additional sensors (sold separately). Also available in a battery-powered version.