SICK WTB12-3F2431 Inductive Proximity Sensor 12 mm

SICK WTB12-3F2431 is a rugged W12-3 series photoelectric proximity sensor with background suppression, housed in a 12 mm‑wide metal enclosure designed for harsh industrial environments. It detects targets at distances from 20 mm up to 350 mm using a visible red LED light at 640 nm, with a light spot about Ø6 mm at 200 mm, and is adjustable via a 5‑turn potentiometer with an off‑delay of 20 ms to accommodate fast‑moving applications. Supplied under part number 1041420, the kit includes two BEF-KH‑W12 mounting clamps with screws for quick installation. The sensor’s background‑suppression principle helps it distinguish foreground objects from clutter, performing best on surfaces with about 90% reflectivity in accordance with DIN 5033. It operates on a 10–30 V DC supply and offers a PNP‑style output in the W12 family configurations, making it straightforward to integrate with common automation circuits. In reliability terms, the device is rated with a mean time to failure of roughly 490 years (DC average) under nominal conditions, reflecting SICK’s emphasis on long‑term performance. The package is commonly used for detecting metal components, parts on conveyors, and other fixed‑location sensing tasks in manufacturing where a compact, non‑contact sensor is required.