Photocells
These are the most common type of device used to provide 'hold open' safety. Photocells work by emitting an infrared beam across the driveway. The infrared beam is constantly monitored by the photocell receiver unit; if the beam is interrupted (broken) the receiver unit sends a signal to the electronic control unit. Normally, photocells are used to prevent the gates from closing but they are sometimes used to signal the gates to open. SEA produce standard plastic long range, slim line and battery systems, also offering solid aluminum anti-vandal units if required.

Vehicle Induction Loop Detector
Induction loops can be used to provide 'hold open safety' or 'start' inputs to open the gate systems. They consist of a coil of cable (loop) set just below the drives' 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 its programmed action.

Safety Edges
2 meters long with integral trigger wire and switch, these items are commonly used to provide safety on sliding gate systems. Safety edges are often combined with battery powered photocells to protect the leading edge of sliding gates.

Warning Lamps
A light with an amber lens that provides warning of a gate's impending or actual movement.

Safety Gate
A patented safety device for swing gates that measures the speed of rotation, providing greater levels of safety particularly where pedestrian access is required. This device can be fitted to any type of SEA mains operators providing stop and reverse safety, acting as if there were safety edges fitted all over the gates. This equipment offers full compliance with the European safety regulations; please contact us for further information.