Beijing HBRK Optical Instrument Co., Ltd., specialize in professional hand-held Refractometers. We supply the refractometer for sugar, salt, alcohol, medical, freezing point, milk and so on, widely used in the food industry, agriculture, aquaculture, as well as laboratory and other areas. Our products are easy to carry, and the accuracy is high. Also, our perfect after-sales, has won all the customersâ?? consistent approval, welcome the domestic and foreign merchants to come to discuss the cooperation.