The Keyence Fiber Unit Optic Sensors series, encompassing models FU-31, FU-32, FU-33, and FU-34, delivers uncompromising precision for the most demanding industrial automation applications. These side-emitting fiber units are engineered for ultra-miniature object detection, with the ability to sense gold wire as fine as 0.005 mm in diameter. Each model offers a unique fiber diameter and length configuration, ensuring optimal performance in confined spaces or harsh environments. With a wide operating temperature range of -40 to +70 °C and a lightweight, free-cut design, these sensors are the ideal choice for high-speed assembly lines, semiconductor manufacturing, and precision robotics.
| Parameter |
FU-31 |
FU-32 |
FU-33 |
FU-34 |
| Beam Emitting Direction |
Side |
Side |
Side |
Side |
| Fiber Unit Length |
2 m (78.74″) free-cut |
1 m (39.37″) free-cut |
1 m (39.37″) free-cut |
2 m (78.74″) free-cut |
| Fiber Unit Diameter |
ø1.0 × 2 |
ø1.3 |
ø2.2 × 2 |
ø2.2 |
| Minimum Bend Radius |
R10 mm (0.394″) |
R25 mm (0.984″) |
R25 mm (0.984″) |
R25 mm (0.984″) |
| Minimum Detectable Object |
Gold wire ø0.005 mm |
Gold wire ø0.005 mm |
Gold wire ø0.005 mm |
Gold wire ø0.005 mm |
| Ambient Temperature |
-40 to +70 °C |
-40 to +70 °C |
-40 to +70 °C |
-40 to +70 °C |
| Weight |
Approx. 5 g |
Approx. 5 g |
Approx. 10 g |
Approx. 17 g |
- Optical Axis Diameter (Standard Target): FU-32: ø0.6 mm; FU-31, FU-33: Not specified; FU-34: ø1 mm. This defines the beam spot size for consistent detection.
- Environmental Resistance: All models withstand extreme temperatures from -40 °C to +70 °C, ensuring reliable operation in cold storage, foundries, or outdoor installations.
- Free-Cut Fiber: The 1 m or 2 m fiber cables can be trimmed to exact length on-site, eliminating waste and simplifying installation in custom enclosures.
- Side-Emitting Design: The beam exits perpendicular to the fiber axis, allowing sensor placement in tight, hard-to-reach positions without compromising detection accuracy.
- Ultra-Lightweight Construction: Weights range from just 5 g to 17 g, minimizing mechanical load on moving parts and robotic arms.
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22