... in various types of non-ferrous metal, ferrous metal pipes, rods, wire, wire, profiles online and offline testing. It has ... a high defect detection sensitivity in metal tubes, rods, wire, wire, profiles of the defects such as surface ... off-line nondestructive testing3,Nondestructive testing such as Oil casing, sucker rods, hollow shaft4,Detection such as Condenser tubes, air conditioner pipe ...