Visible Fault Locator Pen

Fiber Visual fault locators (VFL) are used for installation, fault finding, continuity checking, polarity checking, verifying a signal path, and identifying a fiber. For single mode, multimode and plastic fibers.

  • Very simple to use, compact pen-style checker
  • High quality, durable, drop resistant, metal / rubber body
  • Eye-safe Class 1 visible laser needs no safety precautions
  • 2.5 mm universal connector with translucent captive cap
  • Will not turn on by mistake, or roll off a bench
  • Continuous or pulsed operation
  • The smallest pen available with convenient 2 x AAA batteries
  • Also available in convenient Test Kits
  • 3 year warranty

More information on visual fault finding here



Part Number Fault Location (VFL)
KI6354
Pocket 650 nm, 2.5 mm, Pulsed & CW

Not sure which model you need?

When it comes to reliably testing fiber, one size doesn't fit all!

Fill in a quick quote request, and our qualified engineers will gladly specify what you'll need to get started.