Sino Age Development Technology, Ltd. (SADT), is a leading manufacturer / supplier of measuring and testing instrument, specialized in NDT and quality control fields. Now our main products cover portable hardness tester and bench type hardness tester, ultrasonic thickness gauge, metallurgical microscope, roughness tester, portable vibration meter, optical tachometer, ultrasonic flaw detector and so on. Our main overseas markets are: USA, Canada, Germany, France, Netherlands, Finland, Italy, Czech Republic, Poland, Lithuania, Estonia, Serbia, Greece, Turkey, Australia, New Zealand, Korea, Taiwan, Singapore, Thailand, Indonesia, Malaysia, Vietnam, India, Pakistan, Iran, UAE, Egypt, South Africa, Mexico and Columbia, Peru and etc.