Overview
The Keyence FU-33 is a reflective fiber unit that functions as a sensor head for Keyence fiber optic detection systems. Part of the FU series, the FU-33 is designed to connect directly to compatible fiber optic amplifiers and controllers. Its reflective sensing design makes it ideal for applications requiring detection of objects reflecting light back toward the sensor head.
Key Features
- Reflective sensing configuration for reliable object detection
- Unbreakable fiber optic exit angled at right angle for simplified mounting
- Flexible stainless steel jacket provides protection from daily wear and environmental exposure
- Slot-style mounting holes simplify optical-axis alignment
- Wide optical axis design for easy setup and reduced installation time
- Resin-filled case prevents dust and mist intrusion
Technical Specifications
- Model: FU-33
- Type: Reflective Fiber Unit
- Series: FU Series
- Compatible Amplifiers: Keyence FS-N series, FS-V series fiber optic amplifiers
- Fiber Jacket: Stainless steel
- Mounting: M3 screw holes
- Operating Temperature: -40 to +70°C
- Case Protection: Resin-filled
Typical Applications
- Object detection in tight or confined spaces
- Reflective surface detection for quality assurance
- Non-contact position sensing in assembly lines
- Color or mark detection on moving objects
- Food, beverage, and pharmaceutical inspection
- Machine tool monitoring and safety applications
Compatibility & Replacements
Compatible With
- Keyence FS-N40 fiber optic sensor system
- Keyence FS-N series amplifiers and controllers
- Keyence FS-V series amplifiers and controllers
- Fiber optic amplifiers with standard FU-series connector interface
Replaces / Drop-In Replacement For
The FU-33 is a dedicated reflective fiber unit. Verify compatibility with your existing Keyence amplifier before ordering, as replacement compatibility depends on your specific controller model and sensing requirements.
Works With
- Keyence fiber optic sensor software and configuration tools
- Standard industrial automation networks and PLCs accepting fiber optic sensor inputs
- All Keyence FS-N and FS-V series controllers






