Greenlee 170XL Visual Fault Locator

Compact, Easy to Use, and Can Diagnose a Break Up to 3km Away!

Low Price Guarantee DISCONTINUED

What's special about this fiber optic fault locator?

  • Locate breaks up to 3km away.
  • Continuous wave output mode for steady, accurate fault location.
  • Blinking diode makes fault location easier.
  • Simple to use quick interface fits all 2.5mm connector interfaces.
  • Click for More Features


GL-170XL Greenlee Visual Fault Locator 0.9 lbs DISCONTINUED

The Greenlee 170XL Visual Fault Locator is a vital tool for accurately and expeditiously diagnosing bending losses and breaks in optical fibers as well as testing connectors. In the event a fiber is bent, a red laser light appears through the cable jacket. If a fiber is broken, a light will be visible where the break is located. Regarding connectors, a fiber broken inside or past the ferrule will cause it to glow. If the whole connector glows, it is a defective connector. If the end face polish of the connector is bad, light will be reflected internally.

  • 1.0mW output power
  • Ergonomic style makes this item perfect for one-handed operation.
  • Rotary switch makes for very easy use.
  • Aluminum body is strong, lightweight and splash proof.
  • 48 hours of continuous operation from 2-AA batteries
  • Visual fault locator comes with the nylon belt holster
  • Made in the USA; 1 year warranty.
Light Source Type 635nm Red Laser Diode
Center Wavelength
  Range (typical)

630nm to 640nm
Spectral Width (FWHM) <2nm
Typical Output Power
  Max. into SMF-28 Fiber
  Min. CW Output Mode

1.0mW (0 dBm)
316uW (-5 dBm)
Blink frequency in MOD mode
  Power Requirements
  Battery Life
  Connector Interface
<3kHz (approx)
Two AA size batteries
Approx 48hrs continuous operation
Standard "Quick Connect" universal 2.5mm receptacle
Operational Temperature -10°C to +50°C
Storage Temperature -40°C to +60°C
Humidity 0 to 95% non-condensing
Dimensions Length: 9" [22cm]
Diameter: 1" [2.54cm]
Weight 7oz [200g]
CDRH laser class Class IIIa






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by PowerReviews
Greenlee Visual Fault Locator

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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The Best Out There

By Datacenter Jock

from San Francisco, CA

Verified Reviewer


  • Easy to use and durable


    Best Uses

    • Testing fiber runs

    Comments about Greenlee Visual Fault Locator:

    End to end fiber integrity testing.

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