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Fiber Fault Finder Medium Power Kit

Everything you to need to detect fiber faults up to 300 kilometers away.


Limited Quantity In Stock
Typically Ships within One Week
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • Includes F3X Fiber Fault Finder Gun, MEDIUM-power remote tracer source, and hard-shell case.
  • Use to detect leaks, breaks, and bends in even coated fiber cabling.
  • Finds fractures indoors and outdoors, even in bright daylight!


F3X Fiber Fault Finder Gun (F3X)
  • Just point and shoot. Unique infrared light-detection probe detects leaks, breaks, and bends in fiber.
  • "Sees" faults in brightly lit areas; dark blue-, green-, and black-coated fibers; and dark fiber.
  • Can even locate signals through bulkheads, patch panels, and dust caps.
  • Highly precise. Patent-pending technology pinpoints faults to within inches.
  • Uncovers inefficient and poorly mated connectors and bad splices, too.
  • Works where VFLs don't, even in OTDR dead zones.
  • For identifying aerial breaks, add an optional F3X Aerial Filter and Scope (F3XAFS).

    F3X Light Source 1, Medium-Power Laser (F3XLS1)
  • The optical source and tracer signal generator for use with the F3X Gun.
  • Class 1 laser device provides 2-kHz modulation, 1550-nm wavelength operation, and 5-nm bandwidth.
  • For durability, features aluminum body with high impact rubber bumpers, plus temperature-stabilized output.
  • Powered by alkaline batteries or AC wall pack with NiMH cells (all included).
  • Battery life of 10 hours and quick-charge feature for charging in about two hours.
  • Comes with a fully laminated user's manual.

  • Suspect your fiber network is compromised? Do some serious fiber espionage with this all-in-one fiber leak-detection kit.

    It includes our F3X Fiber Fault Finder Gun, the F3X Light Source 1 with Medium-Power Laser, an AC power pack, and a convenient hard-shelled carrying case for toting the gun and light source around in the field. The waterproof case features pre-cut foam inserts for holding the gun, light source, and accessories in place.

    Great for both premise and outdoor applications, the infrared light-detection kit offers long-distance tracing—up to 300 kilometers (186.4 miles)—and enables you to gather the intelligence you need to ID leaks, breaks, bends, and faults in your fiber network. It's very precise, able to pinpoint faults in your network to within inches.

    It'll save you hours of time in troubleshooting and hours in network downtime, in turn, saving your organization tens of thousands of dollars in lost productivity.

    To find leaks, just point the F3X Gun at your fiber cable run, squeeze the trigger, then sweep the gun over the fiber. Get ready to be amazed. You'll actually see light emanating from any faults, breaks, and bends in the cable. It works in bright daylight, too, eliminating the need to wait until nightfall to work on outdoor cable.

    In the closet, you'll be able to uncover hard-to-find light loss points in connectors mated in bulkhead adapters, patch panels, caps, boots, fanouts, even some dust covers.

    You can also find problems that you previously were unable to diagnose with traditional methods. It offers far more functionality than a visible laser light source. Plus, you can use it in OTDR dead zones and in splice enclosures where it's critical to pinpoint the exact location of faults. Once the gun detects a light loss point, it gives you an audio/visual fault indication.

    The kit is great for troubleshooting all fiber networks. But it's particularly beneficial for mission-critical and secure fiber networks, such as in government, military, education, healthcare, finance, etc.

    Highly sensitive to signals.
    The F3X Gun is so sensitive, it will pick up light signals other fault finders can't—saving you a bundle of time. Use it to pinpoint faults through most jacket types and buffer colors. It will even uncover leaks in fibers with dark blue, green, and black coats.

    The gun is also sensitive enough to detect tracer signals from good-quality fusion splices and capped ports. And it can pick up signals from bends several times more gentle than those induced by many fiber identifiers, and help you locate inefficient and poorly mated connectors, bad splices, and much, much more.
    Surveillance operations, far and wide.
    The F3X is so versatile, you can use it to do the following:
  • Raw fiber identification (end and side access, short and long distances) — Find fiber in a bundle when you have access to the fiber ends. No clamps are needed. In emergencies, you can ID the fiber from the side.
  • Connector panel port identification (short and long distances) — Find a port in a patch panel by scanning the face of the box. You don't need internal access, clamping devices, or bare fiber adapters.
  • Bent and broken fiber leak detection — Locate bends and fractures in bright indoor and outdoor light without the need to block ambient light. Because of its infrared operation, the gun works with many blue, green, and black buffer coatings that can block visible red laser light.
  • Connector end-face splatter detection — Probe connectors from the side and ID damaged end-faces by the light that is splattered—without using a microscope.
  • Ceramic ferrule fiber fractures or misalignments — Probe connectors from the side to detect subsurface fractures inside the ferrule. This is particularly useful with anaerobic adhesive connectors.
  • Epoxyless connector leak detection — Identify inefficient internal splices by sensing light leaking through the ferrule or the connector.
  • Mechanical or fusion splice leak detection — Scan splices from the side to identify damaged splices, leaks, and light scatters. Because of its infrared operation, the F3X kit can outperform visible laser sources.
  • Bulkhead adapter alignment — Scan bulkhead adapters in patch panels to locate light scatters from worn or fractured alignment ferrules.
  • Patch panel adapter failures and raw fiber ID (side access) — Scan the secondary side of connectorized bulkhead adapters to locate light scatters from worn or fractured alignment ferrules.
  • Splitter troubleshooting — Identify where visible lasers do not function by scanning the secondary side of splitters.

    Three MOs.
    Use the F3X kit in three modes of operation:
  • Raw Infrared Light Detection Mode — Detect infrared light including traffic, tracer signals, and CW light. This enables you to locate severe bends and breaks in lightly colored fibers.
  • 2-kHz Remote Tracer Source Light Detection Mode — Examine ports, fibers, splices, or connectors for the presence of a 2-kHz modulated signal. Any light between 1000–1700 nm will be detected. This method also enables you to ID light at uncovered ports up to 300 kilometers away or to locate severe bends and breaks in most 250- or 900-µm buffered fibers.
  • Local Tracer Source Detection Mode — In this mode, the F3X Gun senses light from its own internal source at the rear of the unit. This is the most sensitive mode of operation. Use it to detect breaks in nearly all 250- and 900-µm fibers, usually at the ends of a cable at the ports, splices, and connectors.

    Add a scope to find high-level leaks.
    Think you have a leak or fault in an overhead fiber line? Before you pull out the ladder, pull out the F3X. Outfitted with the optional F3X Aerial Filter and Scope (F3XAFS), the F3X Gun enables you to quickly find leaks in overhead lines. What was once impossible is now possible. All you need to do is point and shoot.

    The F3X Filter, Scope, and Gun can detect cable damage from excessive bends, rodents, and even shotgun pellets from more than 100 feet (30.4 meters) away. Best of all, the F3X system works in bright indoor light, including industrial bays with high ceilings. There's no need to turn the lights out. The F3X will find the leak.

  • Tech Specs

    This product works with:
    Be sure to order filter(s) for your specific fiber environment:
  • F3X Standard Filter, 1280 nm–1680 nm (F3XFSTD)
  • F3X Filter, 1310 nm (F3XF-1310NM)
  • F3X Filter, 1550 nm (F3XF-1550NM)
  • F3X Filter, 1490 nm (F3XF-1490NM)
    You may also need:
  • F3X Aerial Filter and Scope (F3XAFS)
  • F3X Holster for F3X Gun (F3XH)

    NOTE: The light source does not operate in continuous-wave (CW) mode. It's powered by either the four included AA alkaline batteries or the included AC wall pack with four AA NiMH cells.

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.

  • Support



    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $387.35

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $774.70


    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Fiber Fault Finder Medium Power Kit comes with a standard 1 Year Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.