Dapco Industries, Inc. The world leader in the design and development of nondestructive ultrasonic rail, pipe and gas cylinder testing systems. As an established OEM, Dapco specializes in meeting our customer's unique requirements in all applications which utilize ultrasonic techniques to inspect products for internal and external defects. With more than twenty-five years of experience in the areas of ultrasonic transducer, wheel probe and shoe design, as well as providing numerous com ...