KEYENCE FU-35FZ M3 Coaxial Reflective Fiber Unit

KEYENCE FU‑35FZ is a coaxial reflective fiber unit for non‑contact detection of miniature components in industrial automation systems. M3 threaded stainless steel housing with straight 1 m free‑cut flexible fiber (ø1.3×2). R2 mm minimum bend radius for routing in tight spaces, cable carriers and compact machinery. Minimum detectable object ø0.005 mm gold wire. Ambient operating temperature –40 °C to +50 °C. Compatible with KEYENCE FS‑N, FS‑V, FS2, LV‑N and LV‑S series fiber amplifiers (amplifier sold separately).

Applications:

• Detection of miniature electronic components in semiconductor and electronics assembly

• Small part presence verification in pick‑and‑place and high‑speed handling systems

• Precision positioning in packaging machinery with space‑constrained routing

• Parts counting and quality inspection in pharmaceutical and medical device manufacturing

• General industrial automation requiring flexible fiber routing in tight mechanical joints

Technical Specifications:

• Fiber type: Reflective (coaxial detection arrangement)

• Size: M3 threaded

• Housing material: Stainless steel (ruggedized)

• Fiber length: 1 m (free‑cut)

• Fiber diameter: ø1.3 mm × 2

• Shape: Straight

• Minimum bend radius: R2 mm (ToughFlex high‑flex cable)

• Minimum detectable object: ø0.005 mm gold wire (at optimal detection distance and sensitivity setting)

• Ambient operating temperature: –40 °C to +50 °C (no freezing)

• Weight: approx. 6 g

• IP protection: IP67 (when used with compatible amplifier and correct installation)

System Integration:

• This fiber unit belongs to the KEYENCE FU series of fiber optic sensors.

• Compatible with KEYENCE FS‑N, FS‑V, FS2, LV‑N and LV‑S series fiber amplifiers (sold separately).

• Detection distance depends on the selected fiber amplifier and sensitivity mode; refer to the fiber amplifier product catalog.

• The free‑cut fiber cable can be trimmed to exact length for cable management in confined machinery.

• M3 threaded stainless steel housing allows single‑screw mounting in tight spaces.

• For detailed installation, routing and amplifier configuration, refer to the product hardware manual.

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information.

Related Products:

• FS‑N series – Digital fiber amplifiers for use with FU‑35FZ

• FS‑V series – High‑performance digital fiber amplifiers

• F‑2HA – Small spot lens attachment for reduced spot diameter (approx. ø0.4 mm)

• F‑3HA – Parallel light lens for extended detection stability

• OP‑87904 – Sensor head connection cable, 5 m (for IV series vision sensors)