Yudian Automation Technology Co. Ltd. has been devoting itself to the development and manufacturing of industrial process automation controller instruments since 1991. Our controlling and indicating instruments are widely applied in all kinds of industries ranging from chemical, petroleum, metallurgy, pharmaceutical, food and beverage, to academic laboratories and so on. Through 20 years of development, Yudian has become the NO. 1 Chinese intelligent instrument manufacturer, with the largest domestic market share with sales of over 400,000 instruments per year.