... 3.eddy current detector 1. IDEA-24ET multi-frequency eddy current flaw detector2.Fast digital / analog electronic ... balance3.eddy current detector4.ETIDEA-24ET multi-frequency eddy current dynamometer /ET detector DEA_24ET intelligent all_digital ... detected inside and outside the surface cracks,multiple single-frequency eddy current instrument,pits, corrosion, thinning, and wall ...