Shenzhen ould Instrument Co., Ltd. is a high-tech enterprise committed to the R & D, production and sales of industrial automation instruments. The company has obtained the agent of Hirschmann, Lumberg, Metallux, ist, HTP and other core chips. At present, the products developed by the company include Pt series pressure transmitters and ST series temperature sensors, which are widely used in electric power, petroleum, chemical industry, papermaking, metallurgy, food, hydraulic engineering, engineering machinery, pharmaceutical and other industries as well as their equipment supporting fields. The annual output of 800000 sensors is in the leading position in the industry. The company’s pt-4 series pressure sensor products are specialized in air conditioning and refrigeration equipment and measuring refrigerant medium High precision, high stability, strong anti-interference ability and ultra-high cost performance have been highly recognized by the industry.