KARL DEUTSCH ultrasonic transducers are the result of practical experience from decades, theoretical knowledge and manufacturing know-how. Naturally they are manufactured to the standards of a Quality Management System which complies to DIN ISO 9001:2000 - quality, made in Germany! If you are in doubt, whether your existing non - KARL DEUTSCH UT detector is capable of being connected to KARL DEUTSCH transducers, please read the technical info "Ultrasonic Flaw Detector and Probes from different manufacturers?"