---
product_id: 50098117
title: "Extech TG20 Wire Tracer and Tone Generator, Black"
brand: "extech"
price: "฿5509"
currency: THB
in_stock: true
reviews_count: 13
category: "Extech"
url: https://www.desertcart.co.th/products/50098117-extech-tg20-wire-tracer-and-tone-generator-black
store_origin: TH
region: Thailand
---

# Adjustable sensitivity for precise wire tracing 22.1 cm compact size 9V battery powered for portability Extech TG20 Wire Tracer and Tone Generator, Black

**Brand:** extech
**Price:** ฿5509
**Availability:** ✅ In Stock

## Summary

> 🎯 Trace with confidence, work with precision!

## Quick Answers

- **What is this?** Extech TG20 Wire Tracer and Tone Generator, Black by extech
- **How much does it cost?** ฿5509 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/50098117-extech-tg20-wire-tracer-and-tone-generator-black)

## 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

- • **Pinpoint Accuracy:** Adjust sensitivity to eliminate false detections and identify wire pairs flawlessly
- • **Ready Out of the Box:** Includes batteries so you can start tracing wires immediately
- • **Comprehensive Testing:** Check continuity and telephone line polarity with one sleek device
- • **Lightweight & Portable:** Weighs just 100g, perfect for on-the-go professionals
- • **Plug & Play Convenience:** RJ11 modular connector for instant telephone line testing without extra adapters

## Overview

The Extech TG20 Wire Tracer and Tone Generator is a compact, battery-powered tool designed for professional wire identification and testing. Featuring adjustable sensitivity, an RJ11 phone connector, and lightweight design, it enables accurate tracing of wire pairs, continuity checks, and telephone line polarity testing—ideal for efficient troubleshooting and installation.

## Description

Shop Extech TG20 Wire Tracer and Tone Generator, Black. Free delivery on eligible orders of £20 or more.

Review: Good cable tracer - Works well and has lasted
Review: Great tester - Great product for the money. Made finding cables very easy. The only little problem with this was that the panel really needs to be isolated so there isn’t any interference picked up. A very useful tester.

## Features

- Identify wire pairs, check continuity & test telephone line polarity
- Transmitter with output cables terminated in modular RJ11 phone connector
- Adjustable sensitivity control improves wire identification and eliminates false detection
- Easily trace wires from source to termination

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00APD16D2 |
| Best Sellers Rank | 154,088 in DIY & Tools ( See Top 100 in DIY & Tools ) 350 in Multi Testers |
| Brand | Extech |
| Colour | Black |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,764) |
| Item Dimensions | 22.1 x 5.1 x 3.3 centimetres |
| Item Type Name | Wire Tracer and Tone Generator |
| Item Weight | 0.1 Kilograms |
| Lower Temperature Rating | 20 Degrees Celsius |
| Manufacturer | Extech |
| Manufacturer Part Number | TG20 |
| Measurement Type | Ohmmeter |
| Model Number | TG20 |
| Power Source | Battery Powered |
| Specification Met | CE, RoHS |
| Style Name | Modern |
| UPC | 785533712544 793950481202 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 1022 Degrees Fahrenheit |

## Product Details

- **Brand:** Extech
- **Colour:** Black
- **Item weight:** 0.1 Kilograms
- **Power source:** Battery Powered
- **Style:** Modern

## Images

![Extech TG20 Wire Tracer and Tone Generator, Black - Image 1](https://m.media-amazon.com/images/I/81qu6hYzoSL.jpg)
![Extech TG20 Wire Tracer and Tone Generator, Black - Image 2](https://m.media-amazon.com/images/I/81hKzJCexhL.jpg)
![Extech TG20 Wire Tracer and Tone Generator, Black - Image 3](https://m.media-amazon.com/images/I/91mMCH6vWVL.jpg)
![Extech TG20 Wire Tracer and Tone Generator, Black - Image 4](https://m.media-amazon.com/images/I/81t5oEte0yL.jpg)
![Extech TG20 Wire Tracer and Tone Generator, Black - Image 5](https://m.media-amazon.com/images/I/81SIo6GwRoL.jpg)

## Questions & Answers

**Q: What is the maximum distance this will work from the cable?**
A: I would avoid this product. One of the worst I've come across as my profession as a systems engineer.

**Q: Does it work for electrical wiring (220v), having the mains off obviously?**
A: It works on any cable the voltage does not count

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good cable tracer
*by A***D on 25 December 2025*

Works well and has lasted

### ⭐⭐⭐⭐ Great tester
*by C***H on 15 May 2019*

Great product for the money. Made finding cables very easy. The only little problem with this was that the panel really needs to be isolated so there isn’t any interference picked up. A very useful tester.

### ⭐ Terrible.
*by G***D on 1 March 2021*

Terrible.

## Frequently Bought Together

- Extech TG20 Wire Tracer and Tone Generator, Black
- Extech CT20 Remote and Local Continuity Tester

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**Shop now:** [https://www.desertcart.co.th/products/50098117-extech-tg20-wire-tracer-and-tone-generator-black](https://www.desertcart.co.th/products/50098117-extech-tg20-wire-tracer-and-tone-generator-black)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-28*