... detector 1) detect exactly; 2) dustproof and waterproof testing equipment; 3) light weight. Product Name: U600 digital ultrasonic flaw detector ( ... polymethyl methacrylate, composite materials, weld joints, etc. This device can detect defects such as holes, cracks, loosening, impurities, incomplete penetration, ... (lithium battery included)2.2kg U600 digital ultrasonic flaw detector (defects detector)