XiuFen Black Photoelectric Infrared Detector Single Beam Alarm Infrared Sensor as Home Door Security System

XiuFen Black Photoelectric Infrared Detector Single Beam Alarm Infrared Sensor as Home Door Security System

Elvy Galo GATE Opener and Barrier Gates Safety Beam Sensors/Infrared Photocell & Door Sensor with No/NC Adjustable Switch

Real Instruments Single Beam Sensor/Photocell Sensor/Beam Detector Outdoor/Indoor Security Laser IR Infrared Barrier Detector Photoelectric for Gates Safety Security System Automatic Doors (ABO-20)