Magnetic Particle

On ferro-magnetic materials, magnetic particle can detect surface flaws that would not be seen visually. Particles can be of the wet or dry variety in both visible and florescent types. Through use of coils, prods, head shots, and hand yokes, this method can be used on a wide variety of parts in both field and shop environments.

"Magnaflux" is a method of testing ferromagnetic materials using Magnetic Particles to detect surface and sub-surface flaws.