Photoelectric sensors, W4, WTB4FP-21311120ZZZ, Sensing range min. / max.: 4 mm / 220 mm, Functional principle: Photoelectric proximity sensor, Functional principle detail: Background suppression, Switching output: Push-pull: PNP/NPN, Switching mode: Light switching, Connection type: Connector M8, 3-pin, Light source: PinPoint LED, Type of light: Visible red light, Housing material: VISTAL®, Adjustment: Teach-in button, Potentiometer, Teach-Turn adjustment, Housing: Rectangular