The Omron E3K photoeye uses the retroreflective detection method to protect an automatic gate operator from closing on vehicles or pedistrians. The Omron E3K is a preferred photobeam sensor as wires do not need run to both sides of the driveway. Wires from the door or gate operator only need run to sensor side of drive. The unit includes photoeye sensor, universal mounting bracket, and 3 reflector. Use for safeguarding automated gates, overhead doors, and/or as a sensor. The Omron E3K is well known for reliabilty and ease of installation.