The Keyence FU-79U Fiber Unit is a thrubeam-type optical sensor head designed for applications requiring extreme detection precision in compact or challenging environments. With an optical axis diameter of only ‚àö‚àè0.5 mm, this unit is optimized for detecting extremely fine targets that standard fiber units cannot reliably measure. Its high sensitivity allows it to detect opaque objects as small as 0.005 mm in diameter, making it particularly effective in precision electronics, semiconductor inspection, and micro-component assembly.

The fiber unit features a 1 m free-cut cable length, allowing flexible installation tailored to the user’s application. Its minimum bend radius of 2 mm enables integration into tight spaces without compromising performance, making it suitable for modern compact machinery and precision manufacturing lines. The tightening torque of 0.6 Nm ensures stable mounting and alignment, preventing misalignment during long-term operation.

Durability is a key advantage of the FU-79U. Built with an acrylic core fiber, a nylon sheath, and a SUS303 stainless steel case, the unit provides excellent strength, protection against environmental stress, and stable optical transmission. The robust construction ensures that it performs reliably even in harsh industrial environments. With a weight of only 4 g, the sensor remains lightweight while maintaining structural integrity.

The FU-79U is also designed with a high degree of environmental resistance. It operates within a wide ambient temperature range of -40 to +50 °C, ensuring consistent performance in both cold and hot environments. In addition, it maintains stable operation under relative humidity conditions of 35 to 85 % RH, preventing issues caused by condensation or moisture exposure. Its reliability is further enhanced with accessories such as a fiber cutter, FU adapter, and mounting screws, ensuring quick installation and maintenance efficiency.

In demanding industries such as electronics, medical device manufacturing, and precision component inspection, the FU-79U stands out as a trusted solution. Its combination of ultra-fine detection capability, robust mechanical design, and environmental resilience ensures reliable detection of micro-sized targets where accuracy and consistency are critical.

In summary, the Keyence FU-79U Fiber Unit provides exceptional precision, flexibility, and durability, making it an indispensable choice for advanced sensing applications in modern automated environments.