This module can be apply in Program-controlled switches, copiers, washing machines, refrigerators, 
cameras, Disinfection cabinet, door, window magnetic, electromagnetic relays, electronic weighing, level meter, gas meter, water meter and so on

· 1. clean, good waveform driving ability ,more than 15mA.

· 2. working voltage 3.3V-5V

· 3. output format: digital switching output (0 and 1)

· 4. a fixed bolt holes for easy installation

· 5. using a wide voltage LM393 comparator