The SICK WTB9-3P2261 is a W9-series photoelectric proximity sensor with a PNP output, covering a 20 mm to 350 mm sensing range. The 333 µs response time means it can reliably detect parts on a high-speed conveyor or trigger a reject gate without missing a target — that's fast enough for most packaging and material-handling lines running 200+ cycles per minute. The 12 mm wide housing fits into tight machine frames where a standard 18 mm barrel sensor won't go. That's not just splash-proof — it's rated for the 80 °C water at 80-100 bar that sanitation crews use. The M8 4-pin connector keeps wiring clean and allows quick swap-out without opening the panel.
Deployment context
This sensor is sized for washdown zones on packaging machinery, bottle fillers, and palletizers where a standard IP67 sensor would fail within months. The 10-30 VDC supply range works with common 24 VDC control systems. Light-ON / Dark-ON switching selectable via the wiring or a simple teach-in means one SKU covers both presence and absence detection — useful for reducing spare-part variety in a multi-line plant.