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

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4PCS IR Break Beam Sensor, 5MM LEDs Counting Module Split Through-Beam Photoelec

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

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