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  • Locate fiber breakage, winding
  • Red light displays results
  • Different detect ranges: 20mW
  • Continuous or pulse working modes interchangeable
  • NF-904-20

NF-904 Visual Fau[t Locator uses the DFB-LD as the emitting component . Driven by constrant 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.


  1. Easy and accurate identification - it can easily and accurately detect and locate fiber breaks, poor connections, bending or cracking.
  2. The detector will emit a 650nm bright light for fiber tracing, breaks or faults in the fiber will refract the light.
  3. The detector will emit a bright red light for fiber tracing, breaks or faults in the fiber will refract the light, creating a bright glow around the faulty area.
  4. Test for both single-mode and multi-mode cables with optional 2.5mm fiber optic(standard) connectors.
  5. Crash-proof and dust-proof design for laser head. It is designed with durable head to prevent crash and dust, and the case ground design prevents damage efficiently.


  1. Aluminum alloy body, durable for long time use.
  2. Built in ceramic insert of low loss and it is replaceable.
  3. Pen type design and lightweight, easy to carry

Application pictures

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Model NF-904-01 NF-904-05 NF-904-10 NF-904-20
Output power 1mW 5mW 10mW 20mW
Color Black option
Output wavelength 650nm ±10nm
Connector 2.5mm universal connector
Working temperature -20 ~+60 ℃
Storage temperature -40~+70 ℃
Power supply 2 AA battery
Body color Optional choice for Black & White
Continuous working ≥ 20H
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