The Pie Gauge is used as an aid in determining the direction of magnetic fields for detection of discontinuities in ferrous materials.
Pie Gauge
Description
The Pie Gauge is a tool for quickly verifying the direction of magnetic flux on a surface. It is made from eight ferrous segments, braised into a single piece, providing a star pattern of nonferrous discontinuities. Typically used with dry powders for yoke inspection, the Pie Gauge can be held at any angle and will generate indications perpendicular to the direction of the magnetic flux.