Magnetic Particle Test Pieces

Magnetic Particle Performance Evaluation Devices

These test pieces for magnetic particle inspection will help you maintain your mag particle process by verifying magnetic particle performance. Use to check for mag particle deterioration, to compare different magnetic powders, to verify sensitivity or visibility or to assure field direction and strength.

Click on the tabs below to get more details on our mag particle test pieces, or contact us for help choosing the right MPI evaluation device for your process.


Magnetic Flux Indicators

Flexible indicators used to detect appropriate levels of magnetic field strength and directional orientation during the magnetic particle testing process. Each indicator contains three milled slots with widths of .0075", .009" and .010" that share  a common depth.

The indicators are manufactured from permeable magnetic steel sandwiched between two brass plates and designed for repeated use in setting and monitoring magnetic field strength in wet and dry MPI applications.


  • ASTM E709
  • ASTM E1444

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