Eddy current testing is an advanced Non destructive testing (NDT) technique. It is used to simplify the quality and maintenance of material, products, construction in different spell of testing process. Eddy current testing is used to reach the optimum surface and subsurface fault in every portative product and material. The range of quality control manufacturing functions is present pertaining Eddy current inspection principles. Contemporary Eddy current NDT technique has upgrade functions in complicated engineering applications, heat exchanger tube testing, advanced Aerospace component testing etc.