






🚀 Stay ahead with the ultimate fiber optic signal detector—because downtime is not an option!
The Fluke Networks FIBERLERT-125 is a compact, battery-powered fiber optic cable tester that detects optical signals across 850 to 1625 nm wavelengths without any setup. Its non-contact sensor protects fiber ends while providing instant visual and audio confirmation of live fiber activity. Compatible with single-mode, multimode, UPC, and APC fibers, it features an auto power-off to conserve battery life and comes with a two-year warranty, making it an essential tool for professionals demanding fast, reliable fiber diagnostics.








| ASIN | B09KZV7V2J |
| Best Sellers Rank | #50,065 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #90 in Network & Cable Testers |
| Brand | Fluke Networks |
| Brand Name | Fluke Networks |
| Color | Black, white, yellow |
| Customer Reviews | 4.7 out of 5 stars 171 Reviews |
| Included Components | FiberLert, Two alkaline batteries |
| Item Dimensions | 6.6 x 0.6 x 1 inches |
| Item Height | 1 inches |
| Item Weight | 0.22 Ounces |
| Item dimensions L x W x H | 6.6 x 0.6 x 1 inches |
| Manufacturer | Fluke Corporation |
| Measurement Type | Optical Power Meter |
| Model | FIBERLERT-125 |
| Power Source | Battery Powered |
| Specification Met | CE, FCC |
| Style | Modern, Compact |
| Style Name | Modern, Compact |
| UPC | 195112035665 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 50 Degrees Celsius |
| Warranty Description | Two year warranty |
I**S
Fiberlert
Pretty neat tool, got mine with batteries in them already. Did anyone have to buy new batteries?
J**G
Works perfectly
Fluke Networks never fails to impress, and the FIBERLERT-125 Fiber Optic Cable Tester and Detector is another testament to their quality. This tester is a game-changer for anyone dealing with fiber optic cables. Its accuracy and reliability in detecting cable breaks and faults are remarkable, making troubleshooting a breeze. The user-friendly interface and intuitive design make it easy to use, even for those new to cable testing. The durability and precision of this device make it a must-have for professionals working with fiber optics. Highly recommended for its efficiency and peace of mind it brings to cable maintenance and repair tasks." Please note that this is a generic review and may not accurately reflect the specific features or experiences with the Fluke Networks FIBERLERT-125. If you have any firsthand experience or specific details you'd like to include in the review, feel free to provide them for a more tailored and accurate review
J**Y
Product is a must have to verify all fiber pathways
This solved a problem for myself and organization because we forgot our light source. This is the only thing i had in my tool bag to verify the pathway for our fiber connections. Thank you fluke. I have a lot of your products as a Wireless RF Engineer. You all are rock solid company. The smallest, lightest, and the cheapest tool that i have to check a fiber pathway.
R**.
Great tool to have in your IT toolbox!
Great for checking SFP's!
C**Y
Cheap alternative to more expensive tools
Pretty nice tool to have in your tool belt as a network admin. Simply detects light on a fiber strand. No more, no less. You'll need a more feature rich (expensive) tool to really troubleshoot fiber issues, but if you just need to make sure there is light making it through your fiber, this works great.
R**E
I bought the wrong tool
this was a costly purchase but it does not have a light to trace fiber and that is what I was looking for.
A**R
simple quick test to find an active fiber
simple and compact
S**.
Instructions could be better
Instructions could could be better, went to company website to view videos on usage. Needs a lanyard or wrist band not everyone wears a shirt with a pocket in which to put the device. Lightbeat feature is stupid and makes it confusing, when all it does is tell you that it’s about to power off.
Trustpilot
1 day ago
2 months ago