Ultrasonic technology provides the most precise and cost-effective solutions in leak detection, tightness testing, predictive maintenance and automatic quality control in factories. SDT International is recognised as the ......Ultrasonic technology provides the most precise and cost-effective solutions in leak detection, tightness testing, predictive maintenance and automatic quality control in factories. SDT International is recognised as the worlds leading manufacturer of measuring instruments using ultrasonic technology. Its success is based on a history of providing effective solutions to specific problems. This site details how this technology can be put to work for you. If you have any further questions or need technical support, do not hesitate to get in touch with us.