Fibre Optic Identifier

Fibre Optic Identifier – OFI-3

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The Fibre Optic Identifier(OFI-3) is a low cost, portable instrument designed to detect optical signals without disrupting traffic. Based on non-destructive macro bending technology, the FOSOFI-3 does not disrupt traffic, damage or overstress the fiber, enabling efficient, accurate and reliable data acquisition. During maintenance, installations, rerouting or restorations, it’s often necessary to isolate a specific fiber. By simply clamping the FOSOFI-3 onto a fiber, it will indicate if there is a signal, a Modulated Signal, or traffic and show signal direction.


  • Detect a variety of optical tones, 270Hz, 1kHz and 2kH
  • Powered by 2 units of 1.5V AA alkaline batteries
  • RB0.25mm, RB0.9mm, RB3.0mm plungers available

Recognisable wavelength range 900 to 1650 nm
Recognisable signal type CW, 2kHz, 1kHz, 270Hz ± 5%
Detector type InGaAs 2pcs
Clamp type H0.9/0.25 for bare fibres, H2.5 for jacketed fibres
Sensitivity@1310 nm +11dB to -20dBm (Continuous Wave)
+11dB to -10dBm (Modulated Signal)
Sensitivity@1550 nm +11dB to -30dBm (Continuous Wave)
+11dB to -18dBm (Modulated Signal)
LED Indicator Signal traffic, signal frequency(2kHz/1kHz/270Hz)
Signal intensity (5 grades), low battery
Operating temperature -10 to +50°C
Storage temperature -20 to +70°C
Power supply 1.5V AA batteries 2pcs
Dimension (mm) 202L x 62W x 36H
New weight 270g

* This is not the full range – please contact us for your Fibre Optic requirements