1, the use of imported slot optocoupler sensor, slot width 5mm.

2, the output status indicator, the output high-level lights off, the output low-level lights.

3, a block, the output high; no shelter, the output low.

4, the comparator output, the signal clean, good waveform, driving ability, more than 15mA.

5, the working voltage of 3.3V-5V

6, the output form: digital switch output (0 and 1)

7, with a fixed bolt hole, easy to install

8, small board PCB size: 3.2cm x 1.4cm

9, the use of wide voltage LM393 comparator