Will Your Visual Fault Locator Reach 30 km?

We attempt to answer the question, Will Your Visual Fault Locator Reach 30 km? We try to accurately measure the output of some high-power VFLs in use today using a bit of "Test and Measurement" methodologies to get our results.
The answer may surprise you.
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[@alexanderechazabal2798]

Great Video…I work in a headend and been wondering about these VFLs. The ones I use for work are made by EXFo and those only advertise 3-5km

[@VanTekConsulting]

Thanks for the comment. Most of the manufacturers VFL's are 1mW (3-5km). I believe Viavi makes a 5mW "High Output" model, again in the 5km range but a bit brighter inside of that. Thanks again for the positive feedback.

[@SmoothBaileys]

Found one on Amazon that actually went 7 miles... I was impressed.

[@VanTekConsulting]

Was it 7 miles or Kilometers? I have seen some VFLs where under magnification you can see a faint dot, it wouldnt be usable in the field though. I would be interested in knowing the brand/link of the one you have. Thanks for the comment.

[@SmoothBaileys]

@@VanTekConsulting It was 7 miles(11.2 kilometers) Brand is (Karvinger - Rechargeable Visual Fault Locator 30mW 18miles) and I used another which and got 5 miles(8 Kilometers) Brand Sysotek Visual Fault Locator - Rechargeable VFL Fiber Optic Red Light - Retractable Head fits SC FC ST.

[@granttolar9380]

I've got the same pin the I use ever day that does six Miles easy through mst, cases and panels

[@VanTekConsulting]

@granttolar9380 Interesting. 635nm loses about 6dB per km, so even an 80mW VFL is only 19dBm allowing for about 3km of range. 5km - 6km would be a very faint dot as shown in the testing. I'm interested to know the brand you are usnig. Thanks for the comment.