Sino Age Development Technology, Ltd. (SADT), is a leading manufacturer / supplier of measuring and testing instrument, specialized in NDT and quality control fields. We have our own HARTIP series portable hardness testers from the very begining. 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.