The DC12V Infrared Photocell Beam Sensor is a versatile device that can be used for various applications, including gate openers, access control systems, parking lots, defense walls, doors and windows, balconies, garages, passages, and more. It is suitable for installation in schools, office buildings, hospitals, and home yards. This sensor features stable signal transmission with its high-power infrared transmitter and receiver. It creates a reliable and invisible infrared beam that can reach up to 65 inches (20 meters). When the infrared beam is interrupted, the relay will output a switch signal. The sensor is designed to withstand harsh environments with its fully waterproof and dustproof egg-shaped cover and sunlight-filtering case. It is also UV proof, ensuring its durability. Installation is easy, and all you need to do is install each pair of sensors at opposite positions. The infrared area between the two detector parts will detect any movement, and the sensor will send an alarm signal to the alarm host (not included). With its reliable technology, the DC12V Infrared Photocell Beam Sensor provides multiple protection and safety features. It can automatically stop or reverse the gate in case of obstruction, ensuring the safety of your property and yourself. The sensor comes in a sleek black color and is made of PC material, which is both waterproof and UV proof. It has a detection area of 20 meters outdoors and 30 meters indoors, with a detection speed of 30ms. The infrared frequency is 1.92Khz, and the length is 940nm. It operates on DC 12-24V and has a low input current. The relay output is 36W. The sensor has a compact size of 76*49.2*21.6mm (3.0*1.9*0.9 inches). Packing List: - 1 pair of Infrared Sensor (transmitter and receiver) Key Features: Wide application for gate openers, access control systems, and more Stable signal transmission with high-power infrared transmitter and receiver Waterproof and UV proof design for harsh environments Reliable technology for multiple protection and safety Easy installation with opposite position placement Compact size and sleek black color Durable PC material construction Includes 1 pair of infrared sensors (transmitter and receiver)