Further information for Pepperl + Fuchs PF reflection light - GLK18-55/59/161/166
Operating range: 0 ... 4 m, light transmitter: LED, light type: red, alternating light, 640 nm, signal output: N-channel MOSFET, short-circuit proof, switching type: dark switching, connection: Micro AC plug, 1/2' V124, 4-pin, operating voltage: 20 ... 250 V AC/DC, ambient temperature: -20 ... 60 °C (-4 ... 140 °F)