Sanmenxia Zhongrun Precision Air Gauging Corporation Limited is the one of the largest and the most professional high-accuracy measuring tools & inspection instrument manufacturers in China.

Our predecessor is Zhongyuan Measuring Instrument Factory which was built in 1965 by Chinese Government on the basis of the complete imported set of air gauging and electronic measuring technology of TSK, Japan. During more than 40 years of development, Zhongrun Precsision Air Gauging Ltd. has served thousands of enterprises at home and abroad, and designed and developed numerous air gauging fixtures and inspection instruments according to various special workpieces and different production lines.

In order to develop and serve overseas markets, Sanmenxia Zhongrun Precision Air Gauging Corporation Limited founded P3 (Precision/Professional/Proud) Air Gauging Ltd. in 2012, which only serves overseas markets, meanwhile looking for overseas strategic partners in importing & exporting air gauging tools and measuring instruments.