KD-150 is an advanced digital ultrasonic flaw detector, which uses large-screen high-resolution LCD displayer and international advanced digital integration technology. The performance indicators reach the domestic advanced level. The instrument has complete functions, stable performance and easy operation. The instrument is used to detect internal defects of various materials (steel, stainless steel, copper, aluminum, cemented carbide, castings, forgings, composite materials, and welds, etc.), and can detect defects effectively such as pores, cracks, looseness, inclusions, and unwelded. It has a comprehensive and practical function and is widely used in pressure vessel manufacturing, metal steel structures, ship manufacturing, molds, machinery manufacturing, electricity, chemicals, petroleum machinery, automobiles, railways, aviation, metallurgy, universities and other industries.