Magnaflux Magnetic Flux Indicators
These flexible indicators are 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.
The strips are great because:
Five indicators are sold per package