Check the listing for details. Heated Rain Sensing Plate for 12V Rain Sensors. Condition: New. Listed at 40.58 USD. Rain detection plate compatible with all rain sensors that use electrical conductivity detection technology through a plate with comb or corrugated contacts. Thanks to the heated rear part, it is immune to humidity and atmospheric events other than rain, guaranteeing maximum performance at temperatures above 5°C and no false detection even in areas with high humidity. The internal 0.6W heater requires additional power supply 12V DC or AC 60mA minimum, see specifications for other permitted voltages. For sensors to be completely created, a control unit such as our Rain and Flood Sensor is required. CONNECTION: RED and BLACK wire: resistive heater power connection, the wires have no polarity and can be freely connected to a power supply or battery. If you do not intend to use the heater they.