The Keyence FU-55 is a high-precision fiber optic sensor unit engineered for applications that demand exceptional accuracy in detecting ultra-small targets. With its ability to detect objects as fine as 0.005 mm (0.0002″) and a compact ‚àö‚àè2.5 mm size, this unit is ideally suited for industries where micro-scale detection is critical, such as semiconductor production, electronics assembly, and precision component manufacturing.

The standout feature of the FU-55 is its extremely fine optical axis, designed to reliably detect objects down to 0.125 mm (0.005″) in diameter as a standard target, and as small as 0.005 mm (0.0002″) in practice. This capability makes it invaluable for inspecting wire bonds, miniature leads, micro-pins, or other microscopic components that are common in advanced electronics and medical device manufacturing. Its ability to detect such tiny features ensures a higher level of quality control and defect prevention.

The fiber’s compact ø2.5 mm housing allows for easy integration into space-constrained systems. Whether embedded into precision fixtures or mounted in narrow machinery slots, the FU-55 offers the flexibility required to support advanced miniaturised production processes without disrupting existing equipment layouts.

To preserve measurement integrity, the FU-55 is supplied with a fixed fiber length of 50 cm (19.685″), which cannot be cut. This ensures that the carefully designed optical characteristics remain intact, maintaining stable performance over time. The fixed length also simplifies installation planning, as operators can rely on consistent specifications across all units.

Installation flexibility is enhanced by its minimum bend radius of R10 mm (0.394″), allowing the fiber to be routed around machinery components without risk of breakage or performance loss. This feature is particularly useful in compact assemblies where space optimisation is a priority. Despite its fine detection capability, the FU-55 is designed for durability in industrial environments, ensuring reliable operation under continuous use.

Applications for the FU-55 are extensive across industries that require high levels of precision. In semiconductor fabrication, it enables detection of micro-scale leads, wires, and wafers. In electronics, it ensures reliable inspection of solder joints, fine circuitry, or connector pins. In medical device manufacturing, it can be used to confirm the presence or positioning of delicate micro-components. The FU-55’s ultra-small detection capability ensures that even the finest details are not overlooked during production or inspection.

In summary, the Keyence FU-55 is an ultra-precise fiber optic sensor unit designed to meet the most demanding micro-detection applications. With its ability to detect objects as small as 0.005 mm, compact ‚àö‚àè2.5 mm size, fixed 50 cm length, and flexible bend radius, it provides manufacturers with an indispensable tool for ensuring product accuracy and reliability. For industries where precision at the micro-scale is non-negotiable, the FU-55 delivers unmatched performance.