The KEYENCE FU-33 is a compact fiber optic sensor unit designed for precise lateral detection in space-constrained machines. Its side-emitting configuration and robust dual-fiber construction make it a reliable choice for presence and position detection in automated assembly, packaging lines, and general factory automation where consistent performance is essential.

Engineered for flexible routing, the FU-33 provides a 1 m cable that can be cut to length on-site, two Ø2.2 fibers for stable light transmission, and a minimum bend radius of R25 mm to protect the fiber path during installation. Operating from -40 to +70 °C, it supports continuous service in cold rooms, standard production areas, and higher-temperature zones. Pair it with compatible KEYENCE fiber amplifiers to achieve fast response, high sensitivity, and straightforward teach-in across a wide range of targets and mounting geometries.

Built to simplify integration and reduce maintenance, this side-view fiber unit helps minimize downtime while delivering consistent detection performance; to further support long-term reliability in your application, it is supplied with a 1-year warranty as standard.

• Brand: KEYENCE
• Series: FU
• Model: FU-33
• Emission direction: Side-view
• Fiber diameter: Ø2.2 × 2
• Cable length: 1 m, cut-to-length
• Minimum bend radius: R25 mm
• Operating temperature: -40 to +70 °C