---
product_id: 52364160
title: "Extech Instruments 40180 Tone Generator and Amplifier Probe Kit"
brand: "extech"
price: "R3509"
currency: ZAR
in_stock: true
reviews_count: 6
category: "Extech"
url: https://www.desertcart.co.za/products/52364160-extech-instruments-40180-tone-generator-and-amplifier-probe-kit
store_origin: ZA
region: South Africa
---

# Selectable continuous or variable tone generation Built-in speaker with sensitivity control Alligator clips & modular connectors for versatile wiring Extech Instruments 40180 Tone Generator and Amplifier Probe Kit

**Brand:** extech
**Price:** R3509
**Availability:** ✅ In Stock

## Summary

> 🎯 Trace with confidence, troubleshoot like a pro!

## Quick Answers

- **What is this?** Extech Instruments 40180 Tone Generator and Amplifier Probe Kit by extech
- **How much does it cost?** R3509 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/52364160-extech-instruments-40180-tone-generator-and-amplifier-probe-kit)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **Tone it your way:** Choose between continuous or variable tone generation to match your troubleshooting style
- • **Hear every signal:** Integrated speaker with adjustable sensitivity ensures you never miss a tone
- • **Compact power tool:** Lightweight 280g design with included 9V battery keeps you mobile and ready
- • **Plug & play versatility:** Alligator clips and modular connectors adapt seamlessly to telephone and internet wiring
- • **Precision without the short:** Insulated inductive probe tip prevents conductor shorting for safe, accurate tracing

## Overview

The ExtechInstruments 40180 Tone Generator and Amplifier Probe Kit is a CE-certified, heavy-duty wire tracer designed for professional-grade cable identification and troubleshooting. Featuring an insulated inductive probe tip to prevent shorting, a built-in speaker with sensitivity control, and versatile connectors for both non-terminated and modular cables, it offers selectable continuous or variable tone generation. Compact and lightweight at 280g, it includes a 9V alkaline battery for immediate use, making it an essential tool for telecom and network professionals seeking precision and efficiency.

## Description

Extech Instruments 40180 Tone Generator and Amplifier Probe Kit : desertcart.co.uk: DIY & Tools

Review: Didn't work and poor build quality - So I bought this to trace a faulty lead back to my ECU, The product looks very robust in the picture but turned out to be regular flimsy plastic. Getting the battery in the probe was a particular nightmare as the fitting is too tight and the leads too short and not having the dexterity of a concert pianist or surgeon I was lucky not to brake the thing before even using it. I followed what little instructions there are but after an hours worth of trying could not get the thing to trace a cable, it just kept ringing wherever it happened to be pointing, you could point this thing at a bucket of blancmange an it would ring indicating a cable. What really annoyed me was that I thought I'd purchased one of the better quality ones but the lesson here is that, just because it's yellow does not mean Dewalt quality. I don't know if I can send it back as I've tried using it but it certainly didn't do what it said on the tin.
Review: found two broken wires on a 2020 Western star within two minutes. in shop time, it would have been min 3 hours labor.

## Features

- Insulated inductive probe tip prevents shorting conductors
- Built-in speaker with sensitivity control
- Alligator clips for non-terminated cables, modular connectors for direct connections to telephone and internet wiring
- Selectable continuous or variable tone generation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Extech |
| Part Number | 40180 |
| Product Dimensions | 22.86 x 5.84 x 2.54 cm; 280 g |
| Batteries | 1 Product Specific batteries required. (included) |
| Item model number | 40180 |
| Size | Heavy Duty Wire Tracer |
| Colour | Yellow |
| Style | 40180 |
| Power Source | Corded Electric |
| Voltage | 9 Volts |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Certification | CE |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Item Weight | 280 g |

## Product Details

- **Brand:** Extech
- **Power source:** Corded Electric
- **Style:** 40180
- **Colour:** Yellow
- **Item weight:** 0.28 Kilograms

## Images

![Extech Instruments 40180 Tone Generator and Amplifier Probe Kit - Image 1](https://m.media-amazon.com/images/I/511CFHWq73L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Do you have to use the transmitter or can it locate passive cables behind a wall without it?**
A: You can locate 60Hz lines behind a wall to some extent, without the transmitter:  The probe will make a louder 120Hz buzzing noise as it is moved closer to cables.

**Q: If I have both ends of a house wire exposed, how would I hook up to check if I have the correct wire?**
A: You connect the transmitter to a pair of wires in the room, either raw ends or in an RJ11 telephone jack.  Turn it on.  Turn on the probe and check that the toner is working.  Go go to NID, where all the house wiring starts.  The tone can be hear is you are near the wire, louder on the outside of the cable, very loud when actually touch the correct pair of wires.

**Q: Is it easy for a beginner to use? Does it easily hook up to the wire or do I need to cut into the plastic surrounding the wire?**
A: It's easy to connect and you don't need to cut into the insulator, but the problem I had with the tool is:  the signal is so sensitive that I wasn't able to  tell if the wire was cut, because all the wires I was testing were in a harness

**Q: How many feet will this work for?**
A: i was using it very successfully at over 70 feet.  The lines I was tracing were up and over in a building.  So i really do not know the exact distance.  but it worked great

## Customer Reviews

### ⭐⭐ Didn't work and poor build quality
*by M***N on 8 August 2014*

So I bought this to trace a faulty lead back to my ECU, The product looks very robust in the picture but turned out to be regular flimsy plastic. Getting the battery in the probe was a particular nightmare as the fitting is too tight and the leads too short and not having the dexterity of a concert pianist or surgeon I was lucky not to brake the thing before even using it. I followed what little instructions there are but after an hours worth of trying could not get the thing to trace a cable, it just kept ringing wherever it happened to be pointing, you could point this thing at a bucket of blancmange an it would ring indicating a cable. What really annoyed me was that I thought I'd purchased one of the better quality ones but the lesson here is that, just because it's yellow does not mean Dewalt quality. I don't know if I can send it back as I've tried using it but it certainly didn't do what it said on the tin.

### ⭐⭐⭐⭐⭐ Review
*by K***N on 3 June 2022*

found two broken wires on a 2020 Western star within two minutes. in shop time, it would have been min 3 hours labor.

### ⭐⭐⭐⭐⭐ Review
*by F***O on 24 December 2025*

I’ve been an auto tech over 20 years and I don’t know how I ever got by without this tool.But first thank you AMAZON for the very quick delivery !! This device Is easy to use and hasn’t failed me once ,It saves time when pinpointing a wire issue.I Love it Used it many times now and it looks brand new

## Frequently Bought Together

- Extech 40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black, Heavy Duty Wire Tracer
- General Technologies Corp GTC CT6100 Fuse Socket Connector Kit , Yellow
- ES Electronic Specialties 142-5 Flexible Silicon Back Probe Pin, RED, BLACK

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-22*