10PCS IR Infrared Slotted Speed Measuring Detection Optocoupler Sensor Module *s

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ *bh

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ *rr

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ #rt

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ #tr

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ *ib

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ *vb

2PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for /51/AVR/ #ty