Description: The infrared sensor beam photocell is widely used for alarm system, access control, etc. IP55 Rainproof (FOG), Dust (Worms) and other weatherproof design built-in, can maintain normal operation in harsh environment. The range can be reduced to 30% in bad weather conditions: fog, rain, dust, etc.Functionality: photocell beam sensor The color black. Material: Plastic . Size: 8x5x4.5cm / 3.14x1.96x1.77inch. Technology: infrared (photocell). Receiver range: the; 65in (20m). The range can be reduced to 30% in bad weather conditions, such as rain, dust, etc. Frequency: 1.92 KHz. Power supply: 12 V to 24 V DC / AC. Wavelength: 940nm. Input: 15mA RX - TX 30mA, Angle: lt; 10. Operating temperature: -4 F to 122 F (-20 ~ 50). Relay output: 1A max 30V.Note: The best installation height should be more than 20 cm, the distance is not less than 2 meters. infrared protection device should be installed vertically, and at the same level. First installation receiver, installation then the transmitter. When the light off the receiver turns off, then it fixed, the installation completed. Distance between the receiver and the transmitter should be more than 1m, otherwise it will be unresponsive phenomenon.Package included : 1 * Sensor beam photocell 1 * User manual