Miniature light barriers, W4S-3 Inox, WTF4S-3P2462V, switching distance max.: 20 mm ... 200 mm, sensor principle: reflection light sensor, detection principle: foreground suppression, switching output: PNP, switching type: light/dark switching, connection type: M12 connector, 4-pin, light transmitter: PinPoint LED, setting: teach-in button, communication interface: -