MGT Cylinder Magnet Specifications and Features: Complete Technical Guide

Overview: what is an MGT cylinder magnet?

MGT cylinder magnets are compact, cylindrical permanent magnets commonly used with reed switches, hall-effect sensors, and magnetic encoders. This guide explains typical specifications and features for the MGT cylinder magnet, how those numbers affect operation, and practical selection guidance for prototyping, education, and industrial projects in South Africa. The primary keyword "mgt cylinder magnet specifications and features" appears throughout to help you find critical information quickly.

Common uses and form factors

• Actuating reed switches in door/window sensors and flow meters.
• Triggering Hall-effect sensors for position sensing and encoders.
• Holding and fixturing in small assemblies or jigs.
• Typical forms: solid cylinder, countersunk cylinder, and cylindric with threaded bore.

Key specifications to know

When evaluating mgt cylinder magnet specifications and features, focus on magnetic grade, dimensions, pull force / holding force, residual flux density (Br), coercivity (Hci), maximum operating temperature, and coating. These parameters determine how strong the magnet is, how it behaves near sensors, and environmental suitability.

Material choices

Neodymium (NdFeB) cylinder magnets are common for their high energy product and small size. Ferrite (ceramic) magnets are lower cost and more corrosion-resistant without plating. Samrand and Pretoria-area makers often choose NdFeB for compact sensor triggers, while classroom projects may use ferrite for safety and cost reasons. For a broad view of related components and tools, see Communica's collections shop by category.

Standards, labelling and datasheets

Manufacturers label magnets with grade, nominal dimensions, and occasionally pull force. Always request a datasheet for residual flux density (Br), coercivity (Hcb/Hci), and maximum operating temperature. For product ranges and brands available locally, review Communica's stock index all products. If you need supplier background or branch pickup options, see the company profile and branches page about us and branches & trading hours.

Selection criteria: choosing the right MGT cylinder magnet

Match magnet selection to sensor type, required activation distance, mechanical constraints, and operating conditions. Below are practical steps and example calculations to size a magnet for a reed switch or Hall sensor application.

Step 1 - determine required activation field or distance

Reed switches are specified by pull-in distance for a given magnet; Hall sensors usually specify operate point in gauss or millitesla. If your sensor needs 10 mT to switch, choose a magnet and orientation that produces that field at the intended gap.

Step 2 - estimate field using simple approximation

A rough estimate for axial field of a short cylinder magnet at distance z from the face can be made from simplified dipole or more accurate closed-form equations. For practical prototyping, use supplier field maps when available. Example practical rule-of-thumb: doubling diameter or grade increases on-axis field significantly and extends sensing distance.

Example: picking a magnet for a reed switch

Scenario: a reed switch on a sliding door must activate with 5 mm gap. Choose a magnet that provides the reed switch's pull-in field at that distance. If a 6 x 10 mm N42 cylinder gives ~5 mm activation empirically, test with a spare before final assembly. In many educational or rapid-prototype builds, trying 6x10 mm and 8x10 mm cylinders is common practice.

Power and safety notes

Magnets can attract ferrous objects rapidly - keep steel tools, watches, and credit cards away. For neodymium magnets, avoid high temperatures near or above the graded maximum operating temperature. When ordering from Communica for campus or lab use, account for local lead times and VAT invoicing if required for institutional procurement via the shop by brand page.

Troubleshooting and practical tips

• Weak or inconsistent switching: verify magnet orientation (axial face towards sensor) and test with larger diameter or higher grade.
• Unexpected demagnetisation: avoid heating and shock; select higher-coercivity grades if near motors or high fields.
• Corrosion/chipping: choose plated or epoxy-coated magnets for humid environments.

Wiring & simple ASCII diagram for a reed switch circuit

Below is a minimal wiring example to read a normally-open reed switch into an Arduino digital input using a pull-up resistor.

Arduino 5V ---[10k pull-up]---+--- digital input
                              |
                              +--- reed switch ---- GND

Place MGT cylinder magnet close to reed switch face to close contact.

Local availability and procurement notes

Communica stocks a broad selection of components and maker supplies at branches in Samrand and Cape Town with branch collection options. Check stock and lead times for specific magnet part numbers via the main homepage Communica homepage. For institutional buyers, VAT invoices and account quotes are available; review branch trading hours for collection logistics branches & trading hours.

Sources

• Magnet - Wikipedia (general magnet properties) - https://en.wikipedia.org/wiki/Magnet?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital
• Neodymium magnets: properties and grades - NMBTC overview - https://www.nmbtc.com/what-is-ndfeb?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital
• Magnet basics and field calculations - TDK technical article - https://www.tdk-electronics.tdk.com/en/techmag/tech-articles/what-is-magnet?utm_source=straider&utm_medium=referral&utm_campaign=prebo-digital