A fiber visual fault locator pen VFL for fiber optic installation, fault finding, continuity checking, polarity checking, verifying a signal path, and identifying a fiber. For single mode, multimode and plastic fibers, this is a low price fiber laser light tester that complies with the latest visible eye safety standards for fiber laser testers.

  • Easy, compact pen-style laser checker
  • Quality drop-resistant metal & rubber body
  • Class 1 (needs no safety precautions) or Class 2M laser light 
  • 2.5 mm universal connector & translucent captive cap
  • Will not turn on by mistake, or roll off a bench
  • Continuous or pulsed operation
  • The smallest laser pen tracer with 2 x AAA batteries
  • Also available in convenient Test Kits
  • 3 year warranty

MPO-Specific Continuity, Polarity & End Face Tester

More VFL & cable fault finders

Part Number Details

Part Number
Suited for
Source, Visual Fault Locator Pen 1.7 dBm, Universal 2.5mm
Suited for
Source, Visual Fault Locator Pen 7 dBm, Universal 2.5mm
Suited for
Not sure? Make a general enquiry.

Key Features


General Visual Fault Locator Pen KI 6300 Series specifications

For more detailed specifications, please select a specific part number from the parts & stock section.

Wavelength 655 ± 5 nm
Output mode CW or 2~3 Hz modulation
Battery 2 x AAA (LR-03) Alkaline
Battery life > 40 hours
Connector 2.5 mm universal
Retention force for ferrule 1 ~ 2 N
Size 18 mm x 160 mm
Unit weight 83 g (including batteries)
Shipping weight 0.1 kg
Operating / storage temperature -10 to +45 °C / -40 to +70 °C
Relative humidity 95%
Warranty 3 years

Documentation & Support

In the box

Protective Case for VFL

Convenient small case to protect VFL from dust and dirt during transit

Instrument User Manual

Comprehensive user manual, in well written English

Optional accessories


VFL Adapter 2.5mm Male to 1.25mm Female OPT189

Adapts VFL pen with 2.5 mm connector, for use with LC / other 1.25mm ferrule connectors


VFL Adapter Cord 2.5mm - 1.25mm OPT711

Adapts VFL pen with 2.5 mm connector, for use with LC connectors


Fiber Connector Cleaner Cartridge TOOL CLEAN-09A

To clean a connector end face / tip, prior to connector insertion into a mating adaptor.


Stick-Type Cleaner 2.5 mm TOOL CLEAN-03

To clean the end face and mating sleeve of a fiber optic connector with 2.5 mm diameter ferrule. SC, FC, ST etc.


Stick-type Cleaner 1.25 mm TOOL CLEAN-04

To clean the end face and mating sleeve of a fiber optic connector with 1.25 mm diameter ferrule, LC, SN etc

© Kingfisher International, Australia, ABN 51 007 250 213