Pen-type Visual Fault Locator VSL-3105

FOT VSL-3105 Visual Fault Locator

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  FOT VSL-3105 is specially designed for field personnel who need an efficient and economical tool for fiber tracing, fiber routing and continuity checking in an optical network during and after installation. It includes: finding the breakpoint, poor connections, bending or cracking in fiber optic cables, finding the faults of OTDR.

VSL-3105 Visual Fault Locator

VSL-3105 Visual Fault Locator


  • W2.5mm universal connector, operates either in CW or Pulsed
  • Constant output power, lower Battery warning, long battery life (up to 60 hours)
  • Crash-proof and dust-proof design for laser head
  • Laser case ground design prevents ESD damage
  • Burning testing to ensure the reliability.
  • Portable and rugged, easy to use


Central Wavelength650nm ±10nm
Emitter TypeFP-LD
Output Power1mW5mW10mW20mW30mW40mW
Optical Connector2.5mm universal connector For 1.25mm connectors, FC (Male)-LC (Female) convertor can be optional on customer requests
Operating ModelBoth CW and Pulse available
Pulse Frequency2~3Hz
Power Supply2 AA alkaline batteries
Battery Operating Time1mw≥65hour; 3mw≥50hour; 10mw≥15hour
Test with Panasonic LR6AA ALKALINE battery
Operating Temperature-10~+45(℃)
Storage Temperature-40~+70(℃)
Dimension (mm)15*180
Weight120g(Without battery)


VFL Aplication

FOT VFL (Visual Fault Locator) Aplication

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