光遮断器 Photo Interrupter
Optical Sensor Through-Beam 0.035" 0.9mm Phototransistor PCB Mount
得捷: SENSOR OPT SLOT PHOTOTRAN PCB MT
Chip1Stop: Photointerrupter Transmissive 0.9mm Phototransistor 4-Pin PISMR104-001
Panasonic 松下
KOA Speer