Miniature light barriers, W4S-3 Inox Glass, WLG4S-3E1135V, switching distance max.: 0 m ... 5 m, sensor principle: reflection light barrier, detection principle: autocollimation, switching output: NPN, switching type: dark switching, connection type: cable, 4-wire, 2 m, light transmitter: PinPoint LED, setting: cable, communication interface: -