---
product_id: 49038650
title: "Magnetic Field Detector"
brand: "volt stick"
price: "HK$10"
currency: HKD
in_stock: false
reviews_count: 8
url: https://www.desertcart.hk/products/49038650-magnetic-field-detector
store_origin: HK
region: Hong Kong
---

# Detects AC/DC & permanent magnets Powerful red indicator light Versatile for solenoids & relays Magnetic Field Detector

**Brand:** volt stick
**Price:** HK$10
**Availability:** ❌ Out of Stock

## Summary

> 🔴 Illuminate hidden forces with the Magnet Stick—your magnetic field’s best friend!

## Quick Answers

- **What is this?** Magnetic Field Detector by volt stick
- **How much does it cost?** HK$10 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/49038650-magnetic-field-detector)

## Best For

- volt stick enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Operation:** Simply hold near the test area—no complex setup or calibration required.
- • **Universal Compatibility:** Accurately senses AC, DC, and permanent magnets—one tool for every magnetic test.
- • **Instant Magnetic Detection:** Glowing red tip instantly reveals hidden magnetic fields, no guesswork needed.
- • **Professional-Grade Precision:** Trusted by technicians for testing solenoid valves, relays, and hydraulic controls with ease.
- • **Essential for Maintenance Pros:** Streamline diagnostics on vehicles, machines, and oil burners to avoid costly downtime.

## Overview

The Volt Stick Magnetic Field Detector (GO4115421) is a precision instrument that glows red to indicate the presence of magnetic fields, including AC, DC, and permanent magnets. Designed for easy, reliable testing of solenoid valves, relays, and pneumatic or hydraulic equipment, it’s an indispensable tool for maintenance professionals and technicians seeking fast, accurate diagnostics.

## Description



## Features

- The Magnet Stick is an instrument for testing the presence of magnetic fields. By simply holding the tip of the instrument near the test area, it indicates a magnetic field by glowing. The test lamp responds to all kinds of magnetic fields, from alternating current to direct current and permanent magnets.
- Powerful red light in the tip to indicate presence of a magnetic field
- Easy to use Solenoid valves in pneumatic and hydraulic control equipment can easily be tested Test relays with coils and electrically controlled solenoid valves in all types of vehicles and machines Test solenoid valves when servicing oil burners

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Volt Stick |
| Part number | GO4115421 |
| Manufacturer reference | GO4115421 |

## Images

![Magnetic Field Detector - Image 1](https://m.media-amazon.com/images/I/21luDIX84LL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very Useful Tool
*by A***N on 2 October 2013*

This is a must have tool for anyone who fault finds in an engineering environment. It lights when close to a magnetic field, so when for instance a pneumatic or hydraulic valve or electrical contactor/relay energises it will light. very basic/simple, but so helpful when trying to trace faults. Don't confuse it with a volt-stick - Its much more useful.

### ⭐⭐⭐⭐⭐ Great item
*by J***N on 15 May 2016*

Quality item just watch out for the prices you can get them for around £11.That is a genuine one at that price I got stung on here.

### ⭐ Faulty product
*by S***D on 4 December 2018*

Never used product tried it out yesterday for the 1st time and the light stayed a solid red light indication of magnet field working but nowhere near any magnetic fields etcTried again this morning same thing again solid lightFaulty product

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**Shop now:** [https://www.desertcart.hk/products/49038650-magnetic-field-detector](https://www.desertcart.hk/products/49038650-magnetic-field-detector)

---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-27*