---
product_id: 556201911
title: "Fluke Networks FIBERLERT-125 - Single Pack"
brand: "fluke networks"
price: "€ 373.71"
currency: EUR
in_stock: true
reviews_count: 5
category: "Fluke Networks"
url: https://www.desertcart.es/products/556201911-fluke-networks-fiberlert-125-single-pack
store_origin: ES
region: Spain
---

# Detects 850-1625 nm wavelengths 5-min auto power-off battery saver Supports SM, MM, UPC & APC fibers Fluke Networks FIBERLERT-125 - Single Pack

**Brand:** fluke networks
**Price:** € 373.71
**Availability:** ✅ In Stock

## Summary

> 🚀 Stay connected, stay ahead—detect fiber signals like a pro!

## Quick Answers

- **What is this?** Fluke Networks FIBERLERT-125 - Single Pack by fluke networks
- **How much does it cost?** € 373.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/556201911-fluke-networks-fiberlert-125-single-pack)

## Best For

- fluke networks enthusiasts

## Why This Product

- Trusted fluke networks brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Lightweight:** Pocket-sized design at just 6.2g fits perfectly in your toolkit
- • **Universal Compatibility:** Works seamlessly with single-mode, multimode, UPC, and APC fibers
- • **Visual & Audible Alerts:** LightBeat LED flashes and sound cues keep you confidently informed
- • **Smart Battery Management:** Auto shutoff after 5 minutes extends battery life for on-the-go pros
- • **Instant Fiber Signal Detection:** No setup needed—light & sound confirm connectivity in seconds

## Overview

The Fluke Networks FIBERLERT-125 is a compact, battery-powered live fiber detector designed for quick verification of fiber optic activity across single-mode and multimode cables. It supports a broad wavelength range (850-1625 nm) and multiple fiber types (UPC, APC), providing instant visual and audible feedback without any setup. Its smart 5-minute auto power-off feature preserves battery life, making it an essential, hassle-free tool for fiber network professionals.

## Description

Quickly verify fiber activity, polarity, and connectivity with the FiberLert Live Fiber Detector. This pocket-sized tool tests single-mode, multimode, UPC and APC patch cords and ports with a non-contact / non-contaminating detector. The LightBeat feature flashes the LED, indicating a powered-on condition and good battery, a timer shuts FiberLert off after five minutes of inactivity to extend battery life.

Review: This tester is simple to use and very helpful when all you need is to see if the fiber has a good connection.
Review: Pretty neat tool, got mine with batteries in them already. Did anyone have to buy new batteries?

## Features

- Detects optical power in single-mode and multimode fiber wavelengths (near infrared range 850 nm to 1625 nm)
- No setup or interpretation needed - light and sound indicate presence of an optical signal
- Suitable for ports and patch cords, SM, MM, UPC and APC connections
- LightBeat flashes to indicate operation and battery status; powers off after five minutes of inactivity to preserve battery life (2xAAA, included)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09KZV7V2J |
| ASIN  | B09KZV7V2J |
| Batteries | 2 AAA batteries required. (included) |
| Batteries  | 2 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery life | 5 minutes |
| Best Sellers Rank | #59,086 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #259 in Multi Testers |
| Color | Yellow |
| Customer Reviews | 4.7 4.7 out of 5 stars (167) |
| Customer reviews | 4.7 4.7 out of 5 stars (167) |
| Date First Available | 16 August 2023 |
| Date First Available  | 16 August 2023 |
| Included components | Fluke FIBERLERT |
| Item Package Quantity | 1 |
| Item Weight | 6.23 g |
| Item model number | FIBERLERT-125 |
| Item model number  | FIBERLERT-125 |
| Manufacturer | Fluke Networks |
| Manufacturer  | Fluke Networks |
| Material | Plastic |
| Part number | 5317262 |
| Power source type | Battery Powered |
| Product Dimensions | 16.76 x 1.52 x 2.54 cm; 6.24 g |
| Product Dimensions  | 16.76 x 1.52 x 2.54 cm; 6.24 g |
| Specification met | CE |
| Style | Compact |

## Product Details

- **Brand:** Fluke Networks
- **Colour:** Yellow
- **Item weight:** 0.22 Ounces
- **Power source:** Battery Powered
- **Style:** Compact

## Images

![Fluke Networks FIBERLERT-125 - Single Pack - Image 1](https://m.media-amazon.com/images/I/41+MFcSs2lL.jpg)
![Fluke Networks FIBERLERT-125 - Single Pack - Image 2](https://m.media-amazon.com/images/I/41k-N++fRQL.jpg)
![Fluke Networks FIBERLERT-125 - Single Pack - Image 3](https://m.media-amazon.com/images/I/51mXTs5TXDL.jpg)
![Fluke Networks FIBERLERT-125 - Single Pack - Image 4](https://m.media-amazon.com/images/I/51xHfF+QSyL.jpg)
![Fluke Networks FIBERLERT-125 - Single Pack - Image 5](https://m.media-amazon.com/images/I/6134sIcI26L.jpg)

## Questions & Answers

**Q: How does it see polarity?**
A: In terms of polarity, there is no “+” or “-“ as with electrical current. There is only direction of light flow. The tester itself will indicate if there is light flow in a strand and from which direction.

**Q: can't i just use my phone's camera to check for light coming from transceiver? how is this better?**
A: Camera on a phone works great, most of the time.  However, here is why I tend to use the FiberLert

- I struggle to see dim 850nm light and often fail to detect 1300nm or 1550nm light ... perhaps this tells you more about my aging eyes or the quality of the camera on my phone ... but that's my experience

- In tight spaces, I can maneuver the FiberLert into a place where I cannot fit a camera

- I appreciate the ease and speed of mating the FiberLert with the patch cord or bulkhead connector along with the combination of the blinky light plus the audible beep, announcing the presence of light -- fast feedback, as compared to positioning the camera, angling it appropriately, and then staring intently to detect the light

That being said, camera on the phone works most of the time

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***I on 17 December 2023*

This tester is simple to use and very helpful when all you need is to see if the fiber has a good connection.

### ⭐⭐⭐⭐⭐ Review
*by I***S on 23 December 2025*

Pretty neat tool, got mine with batteries in them already. Did anyone have to buy new batteries?

### ⭐⭐⭐⭐ Review
*by A***R on 16 May 2023*

This is a very useful fibre optic detector, can save a lot of time checking cables, SPF modules etc,. Works well with no hassles or issues.

## Frequently Bought Together

- Fluke Networks FIBERLERT-125 Fiber Optic Cable Tester and Detector
- Visual Fault Locator 30KM, VFL Fiber Optic Tester Kit - Include Single Mode 9/125um FC Male to LC Female Adapter, Light Pen for Fiber Network Cable Test
- FiberShack - 1.25mm LC Fiber Cleaner Pen. 800+ Single Click Fiber Cleaner. LCUPC Optical Connector Cleaner & Endface Cleaning Pen Comes with Damage Protection Case & Dust Caps

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-23*