Magnetic incremental permeability (MIP) method is an efficient Non-Destructive Testing (NDT) method for characterizing metallurgical treatments (carburization, shoot-peening). Still, the conventional experimental setup is limited by inherent properties mostly due to the flat coil Eddy Current Testing (ECT) sensor (lift-off, etc.). In this study, direct electrical contacts derived from the magnetic needle probe (MNP) stand in place of the conventional sensor. This alternative “MNP-MIP” method provides directional measurement and solves multiple issues of the current process as applied to material surface treatment inspection.