4, The digital refractometer is a digital high- optical instrument designed by the principle of refraction. It is small and beautiful, easy to use, and LCD large-screen digital display. As long as a drop of sample solution is placed on the prism, the measured value be displayed within 3 seconds, which avoids the subjective error numerical interpretation. 2, Temperature automatic compensation, reduce the error caused by temperature, improve the measurement accuracy 1, fast, high- high-definition display 3, purpose, use of the scene: food, fruits and vegetables, beverages, automotive, chemical, etc., rapid measurement of the concentration of a variety of liquids 5, Professionally measure the sugar content of water samples, food, fruits and , widely used in food industry, beverage industry, agriculture, agricultural food processing industry, etc.