Beijing DMD Optical Instrument Co., Ltd. , which was established in 2001, Is located in Beijing, and is specialized in studying, developing and manufacturing optical instrument. DMD is the professional manufacturer of refractometer and the relative products, including: Portable refractometer, digital refractometer and so on, the new product of ABB refractometer will be push onto the market soon. Our products are not only face to the domestic market, but also export to overseas markets, especially: Europe, America, East Asia and so on. Our Products have been receiving lots of welcome from all over the world because of its better quality and our good service. We welcome you visit our website, and hope to cooperate with you in the nearly future.