The 100 ft. Driveway Vehicle Sensor (FM140) allows a vehicle to drive past the sensor's 12 ft. magnetic field and will open your gate automatically, allowing guests the ability to exit without a Remote (FM135).
Direct burial Gate Opening Sensor (also referred to as a Probe or Wand). Wires directly to the Gate Opener Control Box and senses mass metal in motion. This unit is recommended for use on the inside of the property for free exit by a vehicle without having to push a button. It comes with a 100-Foot cable that should be trenched and placed next to your drive and buried no more than 12-Inches deep. Its 12-Foot magnetic field will detect vehicles (cars, trucks, ATV's, motorcycles, etc.) as they cross through the field, and it will automatically open the gate as the vehicle exits.