Miniature light barriers, W4S-3 Inox Hygiene, WTB4S-3P1262H, switching distance max.: 4 mm ... 500 mm, sensor principle: reflection light sensor, detection principle: background suppression, switching output: PNP, switching type: light/dark switching, connection type: cable, 4-wire, 5 m, light transmitter: PinPoint LED, setting: teach-in button, communication interface: -