Product Description

The KEYENCE FU-59U is a high-precision fiber optic sensor head designed for detecting minute objects in tight spaces. It features a 1-meter free-cut fiber unit with a 0.5 mm optical axis diameter, allowing for flexible installation. The sensor head has a minimum bend radius of 2 mm, ensuring durability and adaptability in confined environments. Constructed with an acrylic core, nylon sheath, and SUS303 stainless steel case, the FU-59U offers robust performance. It operates effectively in ambient temperatures ranging from -40°C to +50°C and weighs approximately 4 grams. The FU-59U is suitable for applications requiring the detection of opaque materials with a diameter as small as 0.005 mm.​

Technical Specifications

• Model: FU-59U
• Optical Axis Diameter: ø0.5 mm
• Fiber Unit Length: 1 meter (free-cut)
• Minimum Bend Radius: 2 mm
• Minimum Detectable Object: Opaque material with a diameter of 0.005 mm
• Tightening Torque: 0.15 N·m
• Ambient Temperature Range: -40 to +50°C (No freezing)
• Relative Humidity: 35 to 85% RH (No condensation)
• Material:
• Core Fiber: Acrylic
• Fiber Sheath: Nylon
• Case: SUS303 Stainless Steel
• Weight: Approximately 4 g
• Accessories Included: Fiber cutter, FU adapter