Profile: Gate Pros offers photo beams, photocells, photoelectric sensors and switches. Our Omron E3K is a long range photoelectric sensor with reflector. It features a universal AC/DC supply voltage with DPDT 10A relay output. Our R4222 GTO photo beam is a photoelectric dual beam detector that provides a non-contact means of entrapment protection. It emits a pulsed infrared beam that, when broken by a person/vehicle, stops/reverses gate operator to prevent entrapment. It includes transmitters, receivers and mounting hardware.