The SICK WTB16P-24161420A00Z2 is a W16 series photoelectric proximity sensor with background suppression. It uses a PinPoint LED visible red light and switches via IO-Link with a push-pull output. The 1.6 mm sensing distance is short — this is not a long-range through-beam; it's for precise object presence detection at close range, like part-present or cap-detection on a conveyor. Rated IP66, IP67, and IP69, the sensor body and optics survive high-pressure washdown and temporary immersion. The M12 4-pin connector keeps field replacement quick — no rewiring a pigtail, just unplug and swap. Response time is 150 µs, which is fast enough for counting applications or high-speed detection on a packaging line. The push-pull output works with both sourcing and sinking PLC inputs, so it adapts to whatever input card is in the panel.
The 20 mm width is the standard W16 footprint — it mounts on a bracket or machine frame with the same hole pattern as other W16 sensors. At 55.7 mm tall and 42 mm deep, it clears tight spaces inside a guard or on a robot arm. Operating voltage range is 10–30 V, so it runs on a standard 24 VDC sensor supply without a separate regulator. The load current is 100 mA, which is typical for a photoelectric — no surprises for the PLC input card or the power budget.