Miniature light barriers, W4S-3 Inox, WL4S-3N2132V, switching distance max.: 0 m ... 5 m, sensor principle: reflection light barrier, detection principle: autocollimation, switching output: NPN, switching type: light switching, connection type: connector M8, 3-pin, light transmitter: PinPoint LED, setting: teach-in button, communication interface: -