SICK WL9-3F2234S20 Photoelectric Proximity Sensor is a retroreflective, rectangular W9-series unit with a 5 m sensing range, 10–30 V DC supply, PNP output, and a 4‑pin M8 connector. It emits visible red light at 650 nm, with a light spot of about 45 mm at 1.5 m, and it includes teach-in via a single button plus the option to attach the DG-Folie 15 × 20 mm external teaching element. As part of the W9 family, this autocollimation retroreflective sensor is designed to reliably detect reflective targets at distance and adapt to target surfaces through its external teach and fixed-spot optics.
