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Shanghai INESA Scientific Instrument Co., Ltd. is a leading electrochemical instrument, analytical instrument manufacturer in China. REX, as China's first ph meter manufacturer in the 1940s, become the largest market occupant in China and now expand its business all around the world. As one of the largest scientific instrument groups in China, REX has gradually grown into a high-tech enterprise with the integration of R&D, production, sales, application, and service. With 80 years of experience in the electrochemical field, REX provides expert water quality test instruments and professional environmental solutions to help our customers against water pollution and environmental degradation. We hope we can live in a greener world with no worry about water in the future.