Application of Hall Effect Method in Wall Thickness Measurement for Non-Ferromagnetic Small Diameter Seamless Tube

In allusion to the characteristic of non-ferromagnetic small diameter seamless tubes( 3 mm×0.5 mm) used by aero engine， the applicability of current nondestructive thickness measurement was analyzed, and the hall effect was put forward by measuring the tube wall thickness. Experiment proved the precision of this measurement could fulfil the demand of the tube wall thickness measurement, and the foreground of application was very good.