Coaxial Reflective Optical Design
The Keyence FU-35TZ uses a coaxial reflective fiber arrangement, placing the transmitting and receiving optical paths in a compact sensor head for object detection with a compatible fiber optic amplifier.
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Keyence
Keyence FU-35TZ Fiber Optic Sensor Amplifier Sensor Industrial Supplier
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PRODUCT DOCUMENTATION
Product Information
Technical specifications, features, applications and purchasing information.
Technical Specifications
| Brand | Keyence |
| Model Number | FU-35TZ |
| Product Category | Reflective Fiber Optic Sensor Head |
| Product Series | FU Series |
| Manufacturer Product Designation | Reflective Fiber Unit |
| Detection Method | Reflective Fiber Optic Sensing |
| Optical Arrangement | Coaxial |
| Sensor Head Size | M3 |
| Sensor Head Shape | Threaded |
| Fiber Unit Length | 1 m (39.37 in.) |
| Fiber Length Adjustment | Free-Cut |
| Fiber Unit Diameter | Ø1.3 mm × 2 |
| Minimum Bend Radius | R2 mm (0.079 in.) |
| Fiber Construction | Tough-Flex |
| Minimum Detectable Object | Gold Wire Ø0.005 mm Under Optimized Detection Distance and Sensitivity Conditions |
| Detection Distance | Dependent on Connected Fiber Amplifier and Operating Settings; Refer to Amplifier Catalog |
| Ambient Operating Temperature | -40 to +50°C (-40 to +122°F) |
| Approximate Weight | 7 g |
| Electrical Power Supply | Supplied Through a Compatible Fiber Optic Amplifier; No Independent Electrical Supply for the Passive Fiber Unit |
| Switching Output | Provided by the Connected Amplifier; Not Integrated into the Fiber Unit |
| Compatible System Examples | Selected Keyence FS-N40, FS-N, FS-V30 and FS-V20 Fiber Amplifier Systems; Confirm Exact Compatibility |
| Optional Compatible Lens | Keyence F-2HA or F-6HA, Subject to Application Requirements |
| Manufacturer Technical Reference | Keyence FU-35TZ Reflective Fiber Unit Specifications |
Key Features
Compact M3 Threaded Sensor Head
The M3 threaded configuration allows installation in suitable mounting fixtures and compact machine assemblies where space around the detection point is limited.
1 Meter Free-Cut Fiber
The factory-specified 1 m fiber length can be cut to suit appropriate installation requirements, allowing the optical path between the sensing head and the connected amplifier to be adjusted.
R2 mm Tough-Flex Construction
The fiber unit features a minimum bending radius of 2 mm, supporting tight cable routing in compact machinery when the manufacturer's installation limits are respected.
Fine-Object Detection Capability
Keyence reports a minimum detectable gold wire diameter of 0.005 mm under optimized sensitivity and detection-distance conditions. Actual capability depends on the amplifier, target and application setup.
Wide Ambient Temperature Range
The FU-35TZ fiber unit is rated for ambient temperatures from -40 to +50°C and weighs approximately 7 g, supporting suitable industrial sensing installations within these limits.
Applications
- Small component presence detection
- Fine wire and miniature part sensing
- Compact automated assembly equipment
- Precision positioning and object detection
- Electronic component handling machinery
- Industrial packaging equipment monitoring
- Space-constrained optical sensing installations
- Maintenance of compatible Keyence fiber optic sensor systems
Purchase Information
We support online purchase of the Keyence FU-35TZ Reflective Fiber Optic Sensor Head. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
Frequently Asked Questions
What is the Keyence FU-35TZ?
It is a Keyence FU series reflective fiber optic sensing unit featuring a coaxial optical arrangement, M3 threaded head and 1 m free-cut fiber.
Is FU-35TZ a complete photoelectric sensor with an amplifier?
No. The FU-35TZ is a passive fiber optic sensing unit. An appropriate separate fiber amplifier is needed to provide light emission, signal processing and an electrical switching output.
What is the sensing method?
The unit uses coaxial reflective sensing, with transmitted light and reflected light carried through separate fiber paths within the same assembly.
What is the sensor head mounting size?
The sensor head uses an M3 threaded design. Check the Keyence dimensional drawing for the complete mounting arrangement.
How long is the fiber cable?
The specified fiber unit length is 1 m (39.37 inches), with free-cut construction for suitable installation adjustment.
What is the minimum bending radius?
Keyence specifies an R2 mm minimum bend radius for the Tough-Flex fiber unit.
What is the fiber diameter?
The manufacturer lists two fiber elements, each with a nominal diameter of 1.3 mm.
What is the minimum detectable object size?
Keyence lists a gold wire measuring 0.005 mm in diameter as the minimum detectable object when sensing distance and amplifier sensitivity are optimally configured. This is not a guaranteed result for every target or installation.
What is the maximum detection distance?
The detection distance depends on the specific fiber amplifier, sensitivity settings and target characteristics. Consult the appropriate Keyence amplifier catalog rather than assuming a single fixed distance.
Which fiber amplifiers can be used?
Keyence lists FU-35TZ in several fiber optic amplifier product families, including FS-N40 and earlier FS series. Verify the chosen amplifier model, fiber connection and required detection performance.
What is the ambient operating temperature?
The fiber unit is specified for -40 to +50°C (-40 to +122°F).
What should be checked before ordering?
Confirm the exact model FU-35TZ, M3 threaded head, coaxial reflective configuration, 1 m free-cut fiber, R2 mm minimum bend radius, compatible Keyence amplifier, required detection distance, mounting dimensions and operating environment.
Need help confirming a model?
Send us your part number and technical requirements.
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