Magnaflux Pie Field indicatorThe Magnaflux Magnetic Pie Field Indicator, also known as a pie gauge, is a device used as an aid in determining the direction of magnetic field for detection of discontinuities in ferrous materials. The Pie Gauge is a great tool for quickly verifying the direction of magnetic flux on a surface. Magnetic Field Direction Indicator Made from eight ferrous segments, braised into a single piece, providing a star pattern of nonferrous discontinuities Key
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