During installation or troubleshooting, the optical pen, also known as a visual fault locator (VFL), is an essential tool for quickly and easily locating faults on optical fibers.

This
version is equipped with a 2.5 mm interface for SC, ST and FC connectors, while the 1.25 mm adapter allows connection to LC and MU connectors. The VFL emits a bright red laser beam (Class II) easily visible from afar. A control button allows operators to choose between two emission modes: continuous or flashing.