This FL7M-3K6H-L5 is a DC 2-wire regular cylindrical proximity switch.
It has a stable sensing area which is shown by the setting indicator, a rigid housing allowing higher mounting torque, firefly glow indicator lamp so it can be seen from any direction, lowest current consumption in the industry at 0.55mA, sealing to IP67G and has the fastest response time in the industry at 2kHz.