A visual fault identifier or visual fault locator (VFI / VFL) is a visible red laser light designed to inject visible light into the fiber cable. Sharp bends, breaks, faulty connectors and other faults will “leak” red light through it hence allowing technicians to visually spot the defects.

Visual Fault Locator Tutorial | FS Community

  • Size (LXBXH): 176.6cm×2.4cm×2.4cm Output optical power:10mW Output wavelength:650nm
  • Dynamic distance:about 10km Fiber optic adapter:Universal connector
  • New unique pen shape design, convenient to carry and field test. Stable power output,low power,outstanding performance.
  • CW and glint mode switchable,aluminum alloy enclosure. Easy identification of fiber break,bend,you can protect the fiber layer
  • Widely used infiber optic transmission,network maintenance and optical fiber test instruments.