General description The DC12-24V Infrared Photocell Beam Sensor is an automatic garage door shutter obstacle detector alarm designed for reliable and safe operation. It consists of a transmitter and receiver that work together to create an invisible infrared beam, ensuring the safety of people and belongings by automatically stopping or reversing doors when the beam is interrupted. This sensor is suitable for various applications, including access control systems, parking lots, and security systems in schools, hospitals, and office buildings. Technical specifications Material: PC (waterproof, UV protection) Detection range: outdoor: 20m; indoor: 30m Working voltage: DC12V~24V Supply current: 50mA Detection distance: 20 meters Trigger time: 50ms Item size: 76 x 49.2 x 21.6mm / 3.0 x 1.9 x 0.9in Installation Install each pair of sensors in opposite positions to create an infrared field between the transmitter and receiver. Ensure proper alignment for optimal performance. Usage Ideal for