Portable FET-9HS intelligent digital type eddy current flaw detector is convenient to take and suitable for online ,offline flaw detection of metal pipe , wire rods,steel pipe,steel rods it can also apply to automatic flaw detection of other mechanical accessories such as the inner wall of the tube,drill plate,bearing coil,hole of the slap,square billet,round billet.Equipped with relative independent testing channel,so it can drive combined probe formed by absolute and differential coil,the detecting channel collect data simultaneously so as to detect longitudinal crack and transverse defect of metal bars,rods,wire rods ,during production. it has high sensitivity on longitudinal defects such as submerged joint and surface opening cracks.It can reliably detect cracks resulted from malfunction during production.