SICK WLL180T-F434 Fiber-Optic Sensor Through-Beam

The SICK WLL180T-F434 fiber-optic amplifier (6039102), part of the WLL180 family, is the receiver unit for a through-beam fiber-optic sensor pair and is delivered with the BEF-WLL180 mounting bracket. It supports through-beam sensing up to 20 meters (0–20 m) with a 650 nm visible red LED light source, and features a compact enclosure (10.5 × 34.6 × 71.9 mm) with a 7-segment indicator and two 4-character digital displays for live readings and parameter configuration. Power is supplied from 12–24 VDC, the single PNP output can be configured in light/dark mode, and the 4-pin M8 connector facilitates straightforward wiring; adjustments are menu-controlled and made via a dedicated teach-in button. The device has an IP50 rating, an average service life of 100,000 hours at 25 °C, and an MTTF_D of 317 years, with the LED classified as low risk under EN 62471/IEC 62471; the WLL180T-F434 is suitable for long-range fiber detection on conveyors, packaging lines, and industrial machinery.