Visual Fault Locator VFL 10mW



Visual Fault Locator VFL 10mW
View of the device
Visual Fault Locator VFL 10mW
Close-up of the output connector

Visual Fault Locator VFL 10mW
The included accessories
Visual Fault Locator VFL 10mW
Visual Fault Locator VFL 10mW
Visual fault locator in action
Key features
  • wavelength: 650 nm,
  • universal connector,
  • suitable for multimode and single-mode fibers,
  • two operation modes: CW / PULSE
The VFL 10 mW visual fault locator is designed to help diagnose problems with fiber optic cabling.
Its universal connector allows for connecting all 2.5 mm standard fiber-optic connectors (e.g. SC/FC/ST). The locator is designed to test single-mode and multimode optic-fiber cables. The output power of the device is sufficient to test fiber sections up to 8 km long.
The output signal can be generated in two modes - continuous and pulse - in order to achieve the desired visual effect. The fault locator is equipped with a dust-proof cover, which prevents dust in the connector area. The cap also protects against accidental exposure of eyes.
In addition to optical path testing, the visual fault locator is an ideal tool for anyone mounting KeyQuick and Ultimode connectors and mechanical splices. After connecting the fault locator to a mechanical splice or connector with transparent body, the installer can control the quality of the connection made and estimate its transmission parameters. No red light in the splice area means a perfect connection.
Mechanical splices and connectors:
Name Visual Fault Locator VFL 10 mW
Code L5935
Wavelength 650 nm
Output power ≥10 mW
Power (batteries) AA (1.5 V) x 2
Weight 80 g (without batteries)
Max range (in fiber) 8-10 km
Dimensions 175x26x26 mm


ULTIMODE Building System is a solution to create FTTH networks in buildings (Fiber To The Home). The system provides a complete range of products for deployment of fiber optic links in each apartment/office, including "open space" offices.


Product type Light source
Source type VFL
Connector universal 2.5 mm
Dimensions mm 180 × 25 × 25
Weight kg 0,16
Power supply 2 × AA