The TFI-35 Optical Fiber Identifier can quickly identify the direction of transmitted fiber and display the relative core power without any damage to the fiber. When traffic is present, the identifier will activate an audible tone. Operates on 270Hz, 1kHz, 2kHz and continuous wave.

The TFI-35 includes 4 nibs for proper seating of fiber by diameter. Each nib can be quickly and easily slid into place in the field to adapt to operator necessity. The 4 sizes covered are the most frequently encountered in telecommunications: 250µm, 900µm, 2mm and 3mm cable. The device is powered with one 9V alkaline battery, not included. The TFI-35 includes a zippered canvas storage case with internal pocket for convenient storage of the nibs.


  • One-key operation
  • Identifies direction of traffic
  • Uses InGaAs detector
  • Displays relative core power
  • Includes Sunshade
  • Easy to swap adaptors
  • Durable metal housing
  • Lower power indication
  • Quality construction

Traffic Identifier
Identified Wavelength Range  800 ~ 1700nm
Adapter 4 pcs, diameters: 0.25mm, 0.9mm, 2mm, 3mm
Identified Signal Type CW, 270Hz±5%, 1kHz±5%, 2kHz±5%
Detector Type Ø1mm InGaAs 2pcs
Signal Direction Left & Right LED
Single Direction Test Range -46~10, 1310nm; -50~10, 1550nm (dBm, CW/0.9mm bare fiber)
Signal Power Test Range 270, 1k, 2k
Power Supply 9V Alkaline Battery
Operating Condition -10 ~ +60°C
Storage Condition -25 ~ +70°C
Dimensions 196 x 30.5 x 27mm
Weight 0.735 lbs

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Orientek TFI-35 Optical Fiber Traffic Identifier

  • Item ID: 254652
  • Orientek
  • Brand: Orientek
  • Model: TFI-35
  • Availability: 1-2 Weeks
  • Condition: New
  • $399.00