---
product_id: 13141502
title: "CMS Magnetics - 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: "71.96 DT"
currency: TND
in_stock: true
reviews_count: 9
category: "Cms Magnetics"
url: https://www.desertcart.tn/products/13141502-cms-magnetics-magnetic-pole-detector-a-handy-polarity-identifier-to
store_origin: TN
region: Tunisia
---

# Color-coded N(red)/S(blue) poles Battery-free, always ready Detects poles from 12+ inches CMS Magnetics - 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:** 71.96 DT
**Availability:** ✅ In Stock

## Summary

> 🧲 Unlock the invisible world of magnets—know your poles, own the field!

## Quick Answers

- **What is this?** CMS Magnetics - 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?** 71.96 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/13141502-cms-magnetics-magnetic-pole-detector-a-handy-polarity-identifier-to)

## 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

- • **Portable & Protective:** Compact 4.75-inch design with vinyl sheath fits perfectly in your pocket or toolkit.
- • **Educational Powerhouse:** Ideal for teachers and science projects to reveal invisible magnetic fields in real time.
- • **Instant Visual Clarity:** Red and blue painted poles make polarity identification intuitive and foolproof.
- • **Battery-Free Reliability:** Manual operation means no downtime—always ready when you need it.
- • **Precision Magnetic Detection:** Ultra-low friction holder senses poles over a foot away for effortless accuracy.

## Overview

The CMS Magnetics Magnetic Pole Detector is a compact, battery-free tool designed to identify the north and south poles of magnets from over a foot away. Featuring a color-coded bar magnet with ultra-low friction pivoting, it offers precise, visual magnetic field detection ideal for educators, students, and professionals. Its portable size and protective sheath make it a durable, on-the-go instrument for science projects and metal detection.

## Description

Unseen Forces Pulled You Here The power of magnetism is within your reach. Click on the scroll button to the right (browser) or swipe left (mobile) to explore more. Established in 2005. Husband and wife, Jeff and Christine Lee started CMS Magnetics, Inc. on a mission to bring magnetism to a wider audience. They provide on-demand magnets in all shapes and sizes for classroom education, research organizations, businesses and industries. Based out in Dallas, Texas. Their warehouse offer a wide range of neodymium, ceramic, AlNiCo, SmCo, and flexible magnets for all sorts of applications and needs. Magnets for Education Visit the Store Magnets for Education Visit the Store Magnets for Office Visit the Store Magnets for Office How did we get our start? Christine Lee's first job was for a magnet manufacturing company. She teamed up with husband, Jeff, to bring a wide variety of magnetic applications to everyday consumers and academics. What makes our products unique? We source from the highest quality metals to manufacture a wide range of magnets for all sorts of applications. Our customers sometimes requests customized magnets based on design and requirement needs. What problem are we solving? It's important we continue providing education on magnetism as it provides a wide range of real world applications. How did we get our start? Christine Lee's first job was for a magnet manufacturing company. She teamed up with husband, Jeff, to bring a wide variety of magnetic applications to everyday consumers and academics. What makes our products unique? We source from the highest quality metals to manufacture a wide range of magnets for all sorts of applications. Our customers sometimes requests customized magnets based on design and requirement needs. What problem are we solving? It's important we continue providing education on magnetism as it provides a wide range of real world applications. Color Magnetic Building Set Inspiring education and creativity through hands on experimenting and play. Color Magnetic Building Set Inspiring education and creativity through hands on experimenting and play. Kitchen Space Saving Organizer Organize your spices with these space saving tin jar organizers. Optional wall mount racks available. Preprinted spice labels included. Kitchen Space Saving Organizer Organize your spices with these space saving tin jar organizers. Optional wall mount racks available. Preprinted spice labels included.

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: Nice Product, but the polarity diagram on the website is backwards. - The polarity/field direction sensor was just about exactly what I expected. It is intended to map out the fields of actual magnets and is barely able to sense Earth's 0.5 Gauss magnetic field. However, it was good enough to give a positive indication that the red end is actually itself a south pole and it points toward north. The polarity diagram shown is backwards. I had already marked a magnet based on a compass and that agreed with this polarity. As noted, the bearings are both a little delicate and have some friction. I put a very tiny drop of ultra-fine clock oil on the two brass pivots and it helped a little. Don't put oil on the plastic bearings, as it might degrade the plastic. The plastic outer bearings are a little crude, but seem to work OK with real magnets. Be very careful not to touch the rotor to any strong magnets. It won't hurt the magnet but could easily damage both sets of bearings. Very useful product.

## 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 tool for educators to visually show the invisible magnetic field through magnets interactions.
- Does not need batteries to work reliably.
- Handy and small for easy transport. Comes with a protective vinyl sheath.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OQRG0HA |
| Adjustable Length | Yes |
| Are Batteries Required | No |
| Batteries Required? | No |
| Brand | CMS MAGNETICS |
| Brand Name | CMS MAGNETICS |
| Color | black |
| Customer Reviews | 4.4 out of 5 stars 722 Reviews |
| Display Type | digital |
| Extended Length | 4.75 Inches |
| International Protection Rating | IP541 |
| Item Dimensions L x W x H | 4.75"L x 1.5"W x 0.13"H |
| Item Weight | 9.07 g |
| Manufacturer | CMS Magnetics |
| Manufacturer Part Number | MPD-002 |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | MPD-002 |
| Power Source | Manual |
| Recommended Uses For Product | Magnetic Locator, Metal Detection |
| Unit Count | 1.0 Count |

## Product Details

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

## Images

![CMS Magnetics - 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)
![CMS Magnetics - 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 2](https://m.media-amazon.com/images/I/71Xc21bTUcL.jpg)
![CMS Magnetics - 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 3](https://m.media-amazon.com/images/I/61pIU6c36RL.jpg)
![CMS Magnetics - 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 4](https://m.media-amazon.com/images/I/51Bprvqr5dL.jpg)
![CMS Magnetics - 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 5](https://m.media-amazon.com/images/I/612AN3UtSFL.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

### ⭐⭐⭐⭐⭐ Nice Product, but the polarity diagram on the website is backwards.
*by S***Y on August 5, 2020*

The polarity/field direction sensor was just about exactly what I expected. It is intended to map out the fields of actual magnets and is barely able to sense Earth's 0.5 Gauss magnetic field. However, it was good enough to give a positive indication that the red end is actually itself a south pole and it points toward north. The polarity diagram shown is backwards. I had already marked a magnet based on a compass and that agreed with this polarity. As noted, the bearings are both a little delicate and have some friction. I put a very tiny drop of ultra-fine clock oil on the two brass pivots and it helped a little. Don't put oil on the plastic bearings, as it might degrade the plastic. The plastic outer bearings are a little crude, but seem to work OK with real magnets. Be very careful not to touch the rotor to any strong magnets. It won't hurt the magnet but could easily damage both sets of bearings. Very useful product.

### ⭐⭐⭐⭐⭐ 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-06-08*