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Optical Fiber Visual Fault Locator- NF-903


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Optical Fiber Cable Visual Locator(Pen type) uses the DFB-LD as the emitting component. Driven by constant current source, the indicator can emit stable red laser.The product can be used to inspect fiber failure when they connect with optical interface and be inserted into single mode or multi mode optical fiber.It is indispensable tool in fiber project constructing, fiber net-work maintaining, optical component manufacture and research.



  • Maintenance in telecom , CATV
  • Test Lab of optical fibers
  • fiber routing and continuity checking in optical networks.
  • Locating the fault of fiber breakage, winding and so on.
  • End-to-end fiber recognition.
  • The optimization of the machine connection point.
  • Continuous or pulse working modes interchangeable.
  • Other fiber optic measurements


Key Features – Pen-Type Visual Fault Locator

·   2.5mm universal connector,

·        Operates either in CW or Pulsed mode with constant output power

·        Long battery life (up to 60 hours)

·        drop-resistant and dust-proof design of laser head

·        Laser case ground design prevents ESD damage

·        Portable and rugged

·        Easy to use

·        Meets CE standards including EMC, EMI, ROHS



1.Don’t connected high voltage lines to avoid buring out the machine.

2.Put into the right place to avoid hurting others,because of the sharp part.

3.Connected the cable to the right port.

4.Read the user manual before use it.



Technical Specifications –  -Visual Fault Locator



Central wavelength


Emitter type

Fibre Type



Output power


Optical connector

2.5mm universal connector, for 1.25mm connectors, FC (Male)-LC.

Operating model

Both CW and Pulse available

Pulse frequency

3Hz to 9Hz

Power supply

2AA alkaline batteries

Operating temperature

-20°C to 60°C

Storage temperature

-40°C to 85°C


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Optical Fiber Visual Fault Locator- NF-903

Optical Fiber Visual Fault Locator- NF-903


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