Photocell beams is designed to increase safety on vehicles, children and even pets.The photo beam sensors are placed(one on each side) between the garage door/gates.During the operation, if the beam is interrupted/broken, the automation unit registers and reverses its operation, avoiding any collision resulting in damage.YET611LSR can be widely used in lifting doors, revolving doors,sliding doors,fence security protocetion,window and balcony security,warehouse security,parking lots and other outdoor security palces.The transmitter and receiver of the The new type laser photocell sensor YET611LSR are integrated, which reduces the trouble of installation.