MOC-7811 IR Opto Isolated Slot Sensor is a slotted opto isolator module, with an IR transmitter and a photodiode mounted on it. Performs Non-Contact Object Sensing. This is normally used as positional sensor switch (limit switch) or as Position Encoder sensors used to find position of the wheel. It ..
This is a Speed Measuring Counter Sensor Groove Coupler Module , the major goal is to check the rate of motor. It was widely used in motor speed detection, pulse count, the position limit, etc. The module can be used in association with a microcontroller for motor speed detection, pulse count, ..