Dry Reed Sensor Module Magnetic Control Switch

imported normally open reed
the comparator output signals clean, good waveform, driving ability, than 15mA.
the working voltage of 3.3V-5V
the output form: digital switching output (0 and 1)
a fixed bolt hole for easy installation
small PCB board size: 3.2cm x 1.4cm
using a wide voltage comparator LM393