Automatic Sensor A self-regulating device, such as a snow sensor, that detects precipitation and temperature and activates a snow melting system during storms to clear a driveway or walkway. Related Articles: Radiant Heated Driveway Systems - a Safe, Energy-efficient Alternative to Manual Snow RemovalPremium Home Amenities – Hot on Any OccasionThe Latest Trends in Home ImprovementSnow and Ice Removal Made EasySnow Melting System Details (Part I)