The Rain Sensor Series HD 2013.2 is based on the capacity principle. The capacity value of the delicate element on an alumina rest, that shifts according to the surface dampened by raindrops. It has unified heater that maintains it dry, it vanishes the liquid and avoids mistaken signals caused by fog or dew. The heater also stimulates at low temperature, reducing the snow and enabling the sensor to identify snow moisture's. Lastly, it has an external circular dome that acts as the windshield for the sensor to avoid mistaken indications.