The Keyence FU-85A Reflective Fiber Unit is engineered for precision detection in environments that require both high accuracy and resistance to elevated temperatures. As part of Keyence’s advanced fiber unit series, this model is built to handle the rigorous demands of industrial automation while maintaining dependable performance in compact and space-restricted setups.

One of its most notable strengths is its heat resistance, with the ability to operate at sustained temperatures up to 105°C (221°F). This capability allows the FU-85A to be deployed in production lines and processes where high ambient heat would normally degrade standard fiber sensors. From packaging equipment near heating elements to assembly machines operating under constant thermal load, this fiber unit ensures measurement reliability without the risk of performance loss due to temperature exposure.

The FU-85A comes with a 2-meter free-cut fiber cable, offering excellent flexibility during installation. Operators can trim the cable to the precise length required, eliminating unnecessary slack and ensuring neat, efficient cable routing within equipment. This adaptability makes it suitable for a wide range of layouts, from compact machines to complex automated systems. The fiber’s ø2.2×2 mm profile ensures both durability and sufficient transmission capacity for stable detection performance.

For precision measurement tasks, the FU-85A excels with its ability to detect ultra-small objects, such as gold wire as thin as 0.005 mm in diameter. This exceptional sensitivity makes it ideal for applications in semiconductor manufacturing, electronics inspection, fine component assembly, and other processes where even the smallest variations must be reliably detected. Such capability supports high-precision quality control, reducing the risk of defective products passing through production.

Despite its durability and advanced performance, the fiber unit remains lightweight, at approximately 21 g, ensuring easy handling during installation and minimal impact on equipment structure. Its robust construction, paired with a minimum bend radius of R25 mm, provides a balance between flexibility and mechanical strength, allowing it to be integrated into systems that experience routine movement or vibration without compromising detection accuracy.

In conclusion, the Keyence FU-85A Reflective Fiber Unit delivers a dependable solution for high-temperature, high-precision sensing applications. Its combination of thermal durability, customizable installation, microscopic detection capability, and lightweight yet rugged design make it a versatile choice for industries requiring consistent and accurate detection under demanding conditions.