3-in-1 Height Adjustable Electrical Weed Cutter
- 50mW APex 3.2 laser that pinpoints breaks up to 50 km / 30 miles.
- 7h rechargeable battery with USB-C charging. No disposables.
- Universal ports: SC/FC/ST native, plus an LC adapter included.
- Lifetime warranty against manufacturing defects, backed by Karvinger support.
Everything you need, in one box

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KLFO50 Visual Fault Locator50mW APex 3.2 laser engine
£229.00£119.90 -
Free giftCarbon fiber premium caseShockproof field protection
$19.90FREE -
FC to LC connector adapterFull connector coverage
$7.90FREE - Lifetime warranty + WhatsApp supportDirect line to a fiber expert FREE
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Seriously bright beam and the build feels solid. The case and dust cap are a nice touch, and the charge has held up great so far.


Great little tool. The light is very bright and it does exactly what I need.


Been running it on the job for a few weeks. The rechargeable battery is a game changer and the beam is so bright I can spot it outdoors, even shining out of fiber lying on the ground from a distance.


Works great, no complaints at all.


This is my third one now. Lost one, gave one away, and grabbed another as soon as it was back in stock. The quality keeps me coming back.


Strong output for the price. Easy to trace a fault, even through a splitter.


Finding a break in a fiber run would be nearly impossible without one of these. Accurate, dependable, and being rechargeable means I can take it anywhere with no cable tying me down.


Comes with the adapters you need and the beam is plenty strong to pin down faults.


Tested it against a set of dummy circuits and it found the fault every single time. Worth the money.


Solid aluminum body, no heat issues, charges over USB-C, and the case is great. The output is a nice even pattern that lights the fiber uniformly.


Finally replaced my old AAA powered VFL with this rechargeable one, and it even came with a case. Perfect for identifying fiber ports on long runs. Recommend.


We use pricey units at work for long runs, but for quick short runs this does the job perfectly without tying up the expensive gear.


It is not a high end Fluke and does not pretend to be, but it works flawlessly for what it is. Convenient, easy to use, and a great value addition to the tool bag.


Built like a tank and the battery easily lasts a full day of testing. USB-C charging beats chasing down spare batteries every time.


Bright enough to trace through connectors and splitters without guessing. It lives in my bag now and I reach for it on almost every call.
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Find faults up to 50 km / 30 miles away
Driven by the APex 3.2 laser engine, engineered specifically for fiber optics, the KLFO50 delivers a stable 50mW @ 650nm beam that reveals even the faintest reflection across long haul spans.
Spot bad connections, macro bends, micro breaks and full cable cuts in seconds. Switch between continuous and flashing (2 to 3 Hz) modes to match any diagnostic scenario, and tackle every intervention with total confidence.
50 km Detection
50mW output locates the smallest faults, bends and breaks over long distances.
Aerospace Aluminum
Aircraft grade alloy shell. Shockproof, crush resistant and far tougher than plastic locators.
7h Rechargeable
Built in USB-C battery ends disposables. Field replaceable when needed.
Universal Ports
SC / ST / FC compatible tip plus an included FC to LC adapter for any job.
Dual Modes
Switch between continuous and flashing light to match your diagnostic needs.
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As featured in






Say goodbye to disposable batteries
Power through your workday with a built in rechargeable lithium cell delivering up to 7 hours of continuous use on a single charge. Recharge anywhere via USB-C: wall socket, laptop, car or power bank. No more hunting for spare batteries mid job.
Machined from a single block of aerospace grade aluminum, the same alloy trusted in aircraft, the KLFO50 shrugs off drops, crushing and harsh job sites that destroy plastic locators. A dust capped optical output, adjustable wrist strap and premium carbon fiber case complete a tool built to last for years.
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Talk to a fiber expert, not a bot
Peter, our in house fiber expert, is available 8am to 6pm, Monday to Saturday to answer your technical questions before and after you buy.

Peter, Fiber Expert
8am to 6pm, Monday to Saturday
Reach us anytime on WhatsApp or by email at support@karvinger.com. We usually reply within a few hours.
Frequently asked questions
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