UD-MFD510 Portable Ultrasonic Flaw Detector can test, orient, evaluate and diagnose various flaws such as unmelted weld joint, unpenetrated weld joint, crack, inclusion, air hole in work piece???s interior swiftly and accurately without any destruction. It is widely used in fields of power engineering, boiler pressure vessel, Steel Construction, war industry, aeronautics, rail transportation, auto and machinery etc. It is the essential instrument in NDT industry.