As China’s first professional analytic instrument production enterprise, “Rex” is the birthplace of first pH electrode and pH meter and has been focusing on electrochemical analytical instruments business. After half-century innovation and accumulation, “Rex” has possessed unique advantages and position, and continued to expand product categories and increase technology. It has over 100 various electrochemical analysis instruments, sensors and applications, including various laboratories, online and on-site inspection series equipment, not only laying a leading position in domestic and international electrochemical analysis industry, but also making its due contributions for electrochemical analysis instruments development in China.