---
product_id: 13141502
title: "Magnetic Pole Detector, a Handy Polarity Identifier to Determine Magnet's North or South Poles, Great for School Teachers, Science Projects, and Metal Detector"
brand: "cms magnetics"
price: "$U986"
currency: UYU
in_stock: true
reviews_count: 9
category: "Cms Magnetics"
url: https://www.desertcart.uy/products/13141502-magnetic-pole-detector-a-handy-polarity-identifier-to-determine-magnets
store_origin: UY
region: Uruguay
---

# Color-coded poles: Red (N), Blue (S) 4.75-inch compact length Detects magnetic poles from 12+ inches Magnetic Pole Detector, a Handy Polarity Identifier to Determine Magnet's North or South Poles, Great for School Teachers, Science Projects, and Metal Detector

**Brand:** cms magnetics
**Price:** $U986
**Availability:** ✅ In Stock

## Summary

> 🧲 Unlock Magnetic Mysteries with a Swipe of Precision!

## Quick Answers

- **What is this?** Magnetic Pole Detector, a Handy Polarity Identifier to Determine Magnet's North or South Poles, Great for School Teachers, Science Projects, and Metal Detector by cms magnetics
- **How much does it cost?** $U986 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/13141502-magnetic-pole-detector-a-handy-polarity-identifier-to-determine-magnets)

## Best For

- cms magnetics enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable:** Slim 4.75-inch design fits effortlessly in your pocket or toolkit for on-the-go use.
- • **No Batteries, No Hassle:** Manual operation means zero downtime—always ready when you need to decode magnetic polarity.
- • **Durable Educational Tool:** Built to withstand classroom use, perfect for teachers and science enthusiasts to demonstrate magnetism.
- • **Precision Pole Detection:** Ultra-low friction holder ensures accurate magnetic field reading from over a foot away.
- • **Visual Clarity with Color Coding:** Red and blue painted poles instantly identify North and South for quick, confident handling.

## Overview

The CMS Magnetics Magnetic Pole Detector is a sleek, battery-free tool designed to identify magnet poles with precision from over a foot away. Featuring a color-coded bar magnet and ultra-low friction holder, it’s perfect for educators, hobbyists, and professionals needing quick, reliable magnetic polarity detection in a compact, durable form.

## Description

This magnetic pole detector is a great low-cost tool to view and identify the polarity of magnets, or to find out if an object is magnetic. Its simple yet durable construction means that this detector makes a great educational tool for teaching students about the properties of magnets and their magnetic fields. This magnetic pole detector consists of a bar magnet with its NORTH pole painted RED and its SOUTH pole painted BLUE. When held up to the south pole of a magnet, the red end of the indicator will point towards the magnet.

Review: Perfect For Classroom! - This product perfectly tracks the pathway of a magnetic field from one pole of a magnet to another. It also works great for locating the poles on a piece of magnetite. I have a chunk of magnetite that has four poles, and it quickly finds and identifies them. It would have to be a very powerful magnet to identify the pole from a couple feet away. I have a 6" x 1" bar magnet, and it picks that up a foot away. But to show the magnetic field is parallel to the body of the bar magnet it needs to be about an inch away on the sides. I go past the end of the magnet a couple of inches and it definitely shows the field orientation. If the magnet in this sensor gets stuck to a bigger magnet, use care separating the two. Slide the sensors magnet to the edge - don't just yank it off! The product advertising does state that this device is 4.75" long, but I missed that. When I opened the package, I was expecting something a bit longer, but that's on me. The compact size does not detract from the operation at all, and it does make it easier to slip into a shirt pocket. This product is a delicate instrument and should be treated carefully. This is not a defect, pivoting a magnet in two axises requires some small parts. Treat it carefully and will reward you with years of service. Give it to careless kids and it won't last. I like it and will order a couple more. I think you will like it too.h
Review: Should have bought this a long time ago - Every 3d printer enthusiast who uses magnets in their prints needs to know these exist. I've wasted so much time trying to figure out which side is which on my magnets and this solves it with a single quick glance. It's nice and compact and feels quite sturdy.

## Features

- Ultra-low friction magnet holder allows for this magnetic pole detector to detect magnetic fields from over a foot away
- Easily detect and identify where the poles on a magnet are in order to safely handle them. This magnetic pole detector consists of a bar magnet with its NORTH pole painted RED and its SOUTH pole painted BLUE
- Great for educators - Teach and show kids what poles on a magnet are and how they interact with each other.
- Handy and small for easy transport

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OQRG0HA |
| Adjustable Length | Yes |
| Batteries Required? | No |
| Brand | CMS MAGNETICS |
| Color | black |
| Customer Reviews | 4.4 4.4 out of 5 stars (719) |
| Extended Length | 4.75 Inches |
| International Protection Rating | IP541 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.32 ounces |
| Item model number | MPD-002 |
| Manufacturer | CMS Magnetics |
| Material | Plastic |
| Power Source | Manual |
| Product Dimensions | 4.75"L x 1.5"W x 0.13"H |

## Product Details

- **Batteries Required?:** No
- **Brand:** CMS MAGNETICS
- **Color:** black
- **Material:** Plastic
- **Power Source:** Manual

## Images

![Magnetic Pole Detector, a Handy Polarity Identifier to Determine Magnet's North or South Poles, Great for School Teachers, Science Projects, and Metal Detector - Image 1](https://m.media-amazon.com/images/I/61mjHIiE66L.jpg)

## Questions & Answers

**Q: Is red north on this magnet? So when you test a magnet and the red side points towards it, that would be the south side of the magnet?**
A: Ignore some of the reviews where people give incorrect information and say this magnet is colored wrong. It's not colored wrong. If checking guitar humbuckers for example, red points at the south coil; blue points at the north coil. Opposites attract. If you point this unit towards the earth's north pole, the red end will point to the north, because the north pole is negative charged; If you point this unit towards the south pole, the blue end will point to the south, as the south pole is positively charged.

**Q: Can this be used to locate underground electrical wires?**
A: A pole detector shows the direction of a magnetic field, and would respond to slow changes in the field strength and direction.  Your underground wire would have to be carrying a direct current so as to generate a magnetic field with a constant field strength at any particular location.  The pole detector has too high an inertia to respond to a magnetic field created by an alternating current at 60 Hz, for example.  You need a metal detector if you are looking for underground wires.  Whether the wire(s) were carrying any current or none would be immaterial to a typical metal detector.

**Q: Would this be good to help with knowing where the new north and south poles would be after the upcoming Geo magnetic pole shift?**
A: No.  Read the item's description!  The CMS Magnetics pole detector is for distinguishing a magnet's north and south poles, not the location of the earth's magnetic poles.

**Q: Will this device reliably tell me the field orientation of brushless motor magnets?**
A: I don't know what your motor magnets consist of, but this simple, reliable device will indicate north and south poles on any permanent magnet.  If you are looking for a stable electromagnetic field, this will also suffice.  If you are looking for something while a motor is in motion, or for a changing magnetic field, then this may not be your answer and you are on your own.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect For Classroom!
*by O***Y on April 16, 2024*

This product perfectly tracks the pathway of a magnetic field from one pole of a magnet to another. It also works great for locating the poles on a piece of magnetite. I have a chunk of magnetite that has four poles, and it quickly finds and identifies them. It would have to be a very powerful magnet to identify the pole from a couple feet away. I have a 6" x 1" bar magnet, and it picks that up a foot away. But to show the magnetic field is parallel to the body of the bar magnet it needs to be about an inch away on the sides. I go past the end of the magnet a couple of inches and it definitely shows the field orientation. If the magnet in this sensor gets stuck to a bigger magnet, use care separating the two. Slide the sensors magnet to the edge - don't just yank it off! The product advertising does state that this device is 4.75" long, but I missed that. When I opened the package, I was expecting something a bit longer, but that's on me. The compact size does not detract from the operation at all, and it does make it easier to slip into a shirt pocket. This product is a delicate instrument and should be treated carefully. This is not a defect, pivoting a magnet in two axises requires some small parts. Treat it carefully and will reward you with years of service. Give it to careless kids and it won't last. I like it and will order a couple more. I think you will like it too.h

### ⭐⭐⭐⭐⭐ Should have bought this a long time ago
*by T***L on February 1, 2025*

Every 3d printer enthusiast who uses magnets in their prints needs to know these exist. I've wasted so much time trying to figure out which side is which on my magnets and this solves it with a single quick glance. It's nice and compact and feels quite sturdy.

### ⭐⭐⭐⭐⭐ Needed for determing magnet polarity for an experiment.
*by D***K on January 22, 2026*

Works good. Determined magnets polarity for my experiment.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-04*