4 Pack IR Break Beam Sensor Module 3mm LED Pair Set for Object Detection

4 Pairs IR Break Beam Sensor 3mm LED Counting Module Photoelectric Switch

4 Pairs IR Break Beam Sensor 3MM LEDs Counting Module Photoelectric Switch New

4 Pairs IR Break Beam Sensor Module with 3mm LED Transmitter Receiver Unit

4 Pairs IR Beam Sensor Module with 3mm LEDs for Automation and Security