Shandong IPRE Inspection Technology Co., Ltd. Shandong IPRE Inspection Technology Co., Ltd., located in Weifang, Shandong, China, is one of the leading professional manufacturers of measuring instruments, including portable / pocket surface roughness testers, Leeb hardness testers and NDT instruments, like coating thickness gauges, ultrasonic thickness gauges, ultrasonic flaw detectors, industrial endoscopes, etc.