2 CHANNEL SPEED SENSOR MODULE COUNTING MOTOR SPEED CONTROLLER MEASURING SLOT TYPE OPTOCOUPLER MODULE
When there is no occlusion in the module slot, the receiving tube turns on and the module outputs a low level. On occlusion, the D0 emits a high level;
The D0 module can be connected to the relay to form a limit switch and other functions. It can also be connected to the active buzzer module to form an alarm.
