Feature:
1, imported normally open reed switch
2, the comparator output, the signal is clean, the waveform, driving ability, more than 15mA.
3, operating voltage 3.3V-5V
4, the output in the form: Digital switching outputs (0 and 1)
5, a fixed bolt hole for easy installation
6 small board PCB size: 3.2cm x 1.4cm
7, wide voltage LM393 comparator
