FU-4F – Fiber Optic Sensor Cable (Keyence Type, 2 m Length, Threaded Head)
Description
The FU-4F is a precision fiber optic sensor cable designed for use with fiber-optic amplifiers in automation, inspection, and positioning systems. It features a threaded M4 stainless-steel head with a straight optical path and is engineered for reliable light transmission and long-term durability in harsh industrial environments.
This model is part of the Keyence FU-series and offers high sensitivity and fast response when paired with compatible fiber amplifiers.
Technical Specifications
- Part Number: FU-4F
- Type: Through-beam fiber optic cable (standard reflective)
- Head Style: Threaded M4 straight type
- Sensing Direction: Straight-view optical axis
- Material: Stainless-steel sensor head / plastic fiber cable
- Fiber Type: Multimode plastic optical fiber
- Core Diameter: 1 mm × 2 cores (typical)
- Sheath Diameter: ~2.2 mm
- Cable Length: 2 m (standard)
- Minimum Bending Radius: 25 mm
- Operating Temperature: –40 °C to +70 °C
- Mounting: M4 threaded barrel with nut included
- Compatible Amplifiers: Keyence FS-series (FS-N, FS-V, FS-T families) and equivalent units supporting FU-type fibers
Interchangeable / Replacement Part Numbers
- FU-4F (standard model)
- FU-4FW (water-resistant version)
- FU-4FZ (angled version, identical optical specs)
- FU-35F (similar straight M4 head, shorter barrel)
✅ Confirmed Compatibility
- ✔ FS-N11N / FS-N12N / FS-N40 / FS-V11 / FS-V21RP amplifiers
- ✔ FS-T1 and FS-T2 series fiber units
- ✔ Automation, packaging, and detection systems requiring M4 straight-view fiber cables
- ✔ OEM sensor blocks designed for Keyence-type fiber terminations
☑️ Key Features
- ☑️ Compact M4 threaded head ideal for precise alignment in tight spaces
- ☑️ High-transmission optical fiber ensures stable detection over long distances
- ☑️ Durable stainless-steel housing resists vibration and contamination
- ☑️ Wide-temperature operation for industrial or laboratory environments
- ☑️ Plug-and-play connection with all standard FU-series amplifiers
