---
product_id: 380515097
title: "FIBERLERT-125 Fiber Optic Cable Tester and Detector"
brand: "fluke networks"
price: "R3779"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Fluke Networks"
url: https://www.desertcart.co.za/products/380515097-fiberlert-125-fiber-optic-cable-tester-and-detector
store_origin: ZA
region: South Africa
---

# 850-1625 nm wavelength detection 5-min auto power-off battery saver Non-contact design protects fiber FIBERLERT-125 Fiber Optic Cable Tester and Detector

**Brand:** fluke networks
**Price:** R3779
**Availability:** ✅ In Stock

## Summary

> 🚀 Stay ahead in fiber optics with Fluke’s no-guesswork tester!

## Quick Answers

- **What is this?** FIBERLERT-125 Fiber Optic Cable Tester and Detector by fluke networks
- **How much does it cost?** R3779 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/380515097-fiberlert-125-fiber-optic-cable-tester-and-detector)

## 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

- • **Damage-Free Testing:** Non-contact sensor ensures zero risk to delicate fiber ends
- • **Pocket-Sized Powerhouse:** Compact, lightweight design fits seamlessly into any pro toolkit
- • **Universal Compatibility:** Works flawlessly with single-mode, multimode, UPC & APC fibers
- • **Long-Lasting Reliability:** Includes 2 AAA batteries & backed by a 2-year warranty for peace of mind
- • **Instant Fiber Activity Detection:** No setup needed—light & sound confirm live fiber in seconds

## Overview

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. Designed for single-mode and multimode fibers including UPC and APC connectors, it features a battery-saving auto shutoff and comes with a 2-year warranty, making it an essential tool for professionals demanding fast, reliable fiber diagnostics.

## Description

No more guessing if the fiber is live. Quickly check fiber activity, polarity, and connectivity. No setup or interpretation required – just place in front of the fiber end face or port and a light and tone indicate an active fiber. This pocket-sized tool tests single-mode, multimode UPC and APC patch cords and ports using a “non-contact” detector. The FIBERLERT-125, detects for the presence of 850 nm to 1625 nm optical light.

Review: Great tool to have in your IT toolbox! - Great for checking SFP's!
Review: 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

## Features

- Detects optical power in single-mode and multimode fiber wavelengths (near infrared range 850 to 1625 nm)
- No setup or interpretation needed – light and sound indicate presence of optical signal
- “Non-contact” detector lessens the risk of damage to fiber optics; 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 to preserve battery (2xAAA, included)
- Two-year warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09KZV7V2J |
| Batteries | 2 AAA batteries required. (included) |
| Best Sellers Rank | #39,542 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #73 in Network & Cable Testers |
| Brand | Fluke Networks |
| Color | Black, white, yellow |
| Date First Available | November 15, 2021 |
| Item Weight | 0.22 ounces |
| Item dimensions L x W x H | 6.6 x 0.6 x 1 inches |
| Item model number | FIBERLERT-125 |
| Manufacturer | Fluke Corporation |
| Measurement Type | Optical Power Meter |
| Power Source | Battery Powered |
| Product Dimensions | 6.6 x 0.6 x 1 inches |
| Specification Met | CE, FCC |
| Style | Modern, Compact |
| UPC | 195112035665 |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Brand:** Fluke Networks
- **Color:** Black, white, yellow
- **Item Weight:** 0.22 Ounces
- **Power Source:** Battery Powered
- **Style:** Modern, Compact

## Images

![FIBERLERT-125 Fiber Optic Cable Tester and Detector - Image 1](https://m.media-amazon.com/images/I/51xHfF+QSyL.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

### ⭐⭐⭐⭐⭐ Great tool to have in your IT toolbox!
*by R***. on January 9, 2026*

Great for checking SFP's!

### ⭐⭐⭐⭐⭐ Works perfectly
*by J***G on December 15, 2023*

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

### ⭐⭐⭐⭐⭐ Fiberlert
*by I***S on December 23, 2025*

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

## Frequently Bought Together

- Fluke Networks FIBERLERT-125 Fiber Optic Cable Tester and Detector
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- 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 South Africa*
*Store origin: ZA*
*Last updated: 2026-03-20*