Magmess Magnet - Over thirty years in magnetic field measuring and testing; products include gaussmeters, fluxmeters, measuring coils, etc.

Forcefield - Powerful Neodymium and Ceramic magnets and other products, sold new and surplus and at wholesale prices. Site also has a FAQ for magnets and electromagnetism, and magnetic demonstration images.

Bartington Instruments - Bartington Instruments manufacture fluxgate magnetometers, magnetic field sensors and magnetic susceptibility systems for soils and rocks

Stangenes Industries, Inc. - Transformers, current transformers, voltage dividers, electromagnets, X-ray power supplies, pulse forming networks.

AMAC International Inc. - Manufactures advanced magnets, cryostats and SRF cavities. The company provides low cost equipment and a variety of services to scientific community of accelerators, superconductivity and cryogenics.

Group3 Technology Ltd. - Precision Magnetic Field measuring instruments, and fiber optically linked Distributed Control Systems.

Electronic Filters - Real-world signals contain wanted and unwanted information. Therefore, some kind of electronic filtering technique must separate the two before processing and analysis can begin.

Books on Electromagnetics - Online bookstore for books on electromagnetics and relating subjects, links on the subject.

Educational Magnets from Indigo Instruments - Neodymium rare earth magnets, steel bar magnets and horseshoe/U-shape magnets for science education, industry and magic.

Hocking NDT Ltd. - Company specializes in eddy current non destructive testing (NDT). An overview of NDT is provided, including theory pages on electromagnetics and practical applications.

Electromagnetic Coilgun Design - Learn about electromagnetic coilgun design principles. These web pages describe theory, design and a small prototype. What is a coilgun? It accelerates a piece of iron or steel down a tube. The tube runs through a series of electromagnetic coils (like solenoids). Some careful timing circuits energize each coil in sequence. The principle of magnetic attraction draws the projectile along at rapidly increasing speed.

Stefan Mayer Instruments - Fluxgate magnetometers, magnetic field compensation systems (active magnetic shielding), magnetic permeability meters, and more.

Space Cryomagnetics Ltd. - Company provides a complete service from design, through assembly, to installation and commissioning. The focus is on custom-built and special magnets, but the company also supplies standard cryogenic equipment and consultancy services.

Spicer Consulting - Electron beams and electronic systems. Equipment for measuring and cancelling magnetic fields in the environment of electron microscopes.

Electromagnetic Coilgun Forum - Directory of links and a threaded discussion forum for electromagnetic coil gun technology.

AC and DC Measurements of Magnetic Properties - The superconducting quantum interference device (SQUID) susceptometer of Magnavolt Technologies is one of the most sensitive instruments for measuring magnetic properties.