5pcs TCST2103 Transmissive Optical Sensor with Phototransistor

5Pcs TCRT5000L Infrared IR Optical Emitter / Sensor Photodiode Phototransistor

5pcs ITR8307 / S18 / TR8 Optical Switches, Reflective, Phototransistor Output

5 Fairchild 20mm Infrared Optical Switches QVL21653 QT916 Phototransistor Sensor

10Pcs TCRT5000L Infrared IR Optical Emitter / Sensor Photodiode Phototransistor

( 2 pcs ) Optical Sensor, QVE00118, Fairchild, 0.197" (5mm), Phototransistor

10x OPB360L11 Optical Sensor Through-Beam 0.125" (3.18mm) Phototransistor PCB MT

1PCS TCST2103 Optical Endstop Switch for Reprap 3D printer NEW