Zhejiang Zhongheng Instrument & Meters Co., Ltd. (national second-class measuring unit) founded in 1984, manufactures automation instruments and meters for petroleum industry. Our main products cover: “YONGYI” shock-resistant manometer, JZ weight indicator, well multi-parameter meter, mechanical tension dynamometer, slurry analyzer, smart stop-proof controller and sensor, etc., more than 50 specifications in total. Our products are very popular in many fields such as big ...[Detail]