Available. The Keyence FU-59U is a fiber optic sensor unit designed for precise detection in industrial automation applications. This thrubeam-type sensor features a 0.5 mm optical axis diameter, allowing it to detect objects as small as 0.005 mm in diameter. The 1-meter fiber unit is free-cut, providing flexibility in installation, and has a minimum bend radius of 2 mm to ensure durability. Constructed with an acrylic core fiber, nylon fiber sheath, and SUS303 case, the FU-59U offers robust performance in various environments. It operates effectively within an ambient temperature range of -40 to +50°C and relative humidity of 35 to 85% RH, without condensation. The sensor is equipped with a tightening torque of 0.15 Nm and includes accessories such as a fiber cutter and FU adapter. With a weight of approximately 4 grams, the FU-59U is a lightweight and reliable solution for precise object detection in industrial settings.