Updated June 11, 2019

The 6 Best Fiber Identifiers

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Best High-End
Best Mid-Range
Best Inexpensive

This wiki has been updated 8 times since it was first published in January of 2019. Fiber identifiers clamp on to the exterior of fiber optic cables, detecting signals on the line by safely inducing a tiny insertion loss. They're especially useful during maintenance, allowing technicians to check whether lines are live or dark without disconnecting. Our selection of instruments is comprised of some of the best offerings on the market at a range of price points. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki. Skip to the best fiber identifier on Amazon.

6. Tribrer AFI420L

5. Joinwit JW3306B

4. Viavi FI-60

3. Greenlee FI-100

2. Exfo LFD-202

1. Noyes OFI-400

Special Honors

AFL OFI-BIPM For those who like to work with flashiest technology possible, this identifier packs all the functionality of the company's OFI-400 model, and packages it with a sleek, backlit, 2.4" touchscreen. aflglobal.com

Editor's Notes

June 07, 2019:

Before deciding to purchase any of these selections, make sure the identifier in question is designed to accommodate every size of fiber dictated by your needs. One major differentiator between these instruments is what sizes of conductor they'll accept, and whether or not they're only designed to read single-mode fibers, or both single-mode and multi-mode.

Another consideration is whether you want an instrument that relies on detachable adapter heads, or an adjustable, fixed clamp block. While constantly switching out adapter heads can be inconvenient, and potentially a recipe for lost parts, the sensors on these testers are often the part that goes first and, if this wear occurs after your warranty expires, the possibility of ordering new adapter heads from the manufacturer might be appealing. It should be mentioned that none of these companies advertise replacement heads for their identifiers, but it's an issue that would likely be resolvable via customer service channels.

Lastly, while we're talking about longevity, given the high cost of these devices, I'd urge you to consider the manufacturer's warranty offered with them. Noyes, for example, comes in ahead of the pack, offering a five-year warranty against defects. And, a special tip of the hat to Greenlee, who backs all their testers with a lifetime warranty for the original owner.

Last updated on June 11, 2019 by multiple members of the ezvid wiki editorial staff

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