Miniature light barriers, W4S-3 Inox Hygiene, WTF4S-3P3264H, switching distance max.: 20 mm ... 200 mm, sensor principle: reflection light sensor, detection principle: foreground suppression, switching output: PNP, switching type: light switching, connection type: cable with M8 connector, 4-pin, 150 mm, light transmitter: PinPoint LED, setting: cable, teach-in button, communication interface: -