Magnetic detectors

Magnetic detector is a non-destructive testing device particularly used for searching superficial/sub-superficial flaws, hardly visible to the naked eye, on ferromagnetic materials.

To perform a non-destructive magnetoscopic test, the magnetic detector with its permanent magnet is employed on the sample, after the application of a special contrast varnish spray (where necessary) and a magnetic special powder. The presence of cracks or other flaws causes a "break" of natural magnetic field of the piece, and the metal magnetized particles create a cluster in correspondence of the discontinuity.

This type of test is particularly employed in control of welds, castings, traction ropes.

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