Induction loops can be used to provide 'hold open safety' or 'start' inputs to open the gate systems. It consists of a coil of cable (loop) set just below the driveway surface. The tails of this loop are wired back to the electronic detector unit. When a vehicle passes over the loop, the metalwork of the passing vehicle causes the detector unit to change state and signal the automatic gate system to perform the
programmed action.
