Ultrasonic flaw detectors can detect, locate, evaluate and diagnose various defects (cracks, inclusions, pores, etc.) inside workpieces quickly, conveniently, non-destructively and accurately. They can be used in laboratories as well as on-site projects. This instrument can be widely used in manufacturing, steel and metallurgy, metal processing, chemical industry and other fields that require defect detection and quality control. It is also widely used in in-service safety inspections and life assessments in aerospace, railway transportation, boilers and pressure vessels and other fields.