The instrument use the artificial intelligence technology. It has very strong function and can be used very convenient. MFD500B can test, orient, evaluate and diagnose various flaws such as crack, lard, air hole in worklpiece’s interior swiftly and accurately without any destruction. It can not only be used in lab but also can be used on engineering site. Also, it can be widely used for safety checking and life evaluating in fields of aeronautics, rail transportation and boiler pressure vessel.