1. The use of imported groove coupler sensor 2. The groove width of 5mm 3. Output status indicator, the output of the lamp off is high, the output is low. 4. Obscured, output high; unobstructed, output low 5. The comparator output signal clean, good waveform, driving ability, more than 15mA 6. The working voltage of 3.3V-5V 7. The output format: digital switching outputs (0 and 1) 8. A fixed bolt holes for easy installation 9. Small PCB size plates: 3.2cm x 1.4cm 10. Using LM393 wide voltage comparator Module use: 1. Unobstructed module location when the receiver is powered on, the module DO output is low, during blocking, the DO output is high; 2. Can be connected to the relay module DO dial limit switch functions, the buzzer can be connected to the active module dial alarm.
