Instrument Co., Ltd. Zhejiang Constant, the state two units of measurement. Specializing in the production of oil industry automation instrumentation.

       Leading products, "Yong instrument"brand pressure gauge, JZ weight indicator, drilling multi-parameter instrument, mechanical tension table, mud analyzer, smart anti-Dayton controller, where the Seoul out, sensors, dozens of series over fifty Specifications, the products sell well throughout the major oil, chemical, geological exploration and other related industries, and exported to the United States, Europe, Middle East and other regions. Has won the Provincial Science and Technology Progress Award and the National Spark Program Fair Gold Medal. Seismic electric contact pressure gauges fill the gaps, access to national patent.