We recommend installing the Flood Sensor in a flood-prone area, such as a basement or near appliances (i.e. washing machine, water, heater, sump pump). This location needs to be within 100 ft. of the control panel to ensure proper communication. Install the sensor where it is easily accessible and not exposed to moisture or extreme temperatures. When you’re ready to install the sensor, the sensor should be placed with the metal prongs and serial number facing down.