coupler sensor, slot width 5mm. output status indicator lamp output high, output low lights. block, output high; no shelter, output low. the comparator output signal clean, good waveform, driving ability, than 15mA. the working voltage of 3.3V-5V the output format: digital switching output (0 and 1) fixed bolt holes for easy installation small PCB board size: 3.2cm x 1.4cm using a wide voltage comparator LM393
