SICK WTB9-3P2461 Photoelectric Proximity Sensor

Compact SICK WTB9-3P2461 Photoelectric Proximity Sensor delivers reliable diffuse-reflection detection with background suppression across a 20 mm to 350 mm range. This variant in the W9 family is designed for 10–30 V DC operation and is built in a rectangular housing measuring 12.2 x 52.2 x 23.6 mm, with an M3 mounting hole for straightforward installation in tight spaces. It uses a PinPoint LED emitting a visible red beam at 650 nm, and is adjustable via a five-turn potentiometer to set the switch point for objects with high reflectivity—specifically around 90% reflectance per DIN 5033. The part number 1049049 identifies this model. In automation tasks such as presence/absence sensing on conveyors, packaging lines, and machine cells, its compact form factor and background-suppressed sensing help reduce false triggers from the background, while its rugged rectangular profile and 10–30 V DC supply enable straightforward integration into existing control schemes. Non-contact operation minimizes wear and enables high-speed sensing on conveyors and packaging lines. The compact housing fits tight spaces beside conveyors or within machine frames, and the five-turn threshold adjuster provides flexibility to tune the sensor for varying reflectivity targets while maintaining reliable performance across typical industrial environments.