The dr66902 Abbe refractometer is an instrument that can measure the refractive index nD and average dispersion nD-nC of transparent, translucent liquids or solids (which mainly measure transparent liquids). If the instrument is connected to a thermostat, the temperature can be measured as 10 ℃-The refractive index nD within 50 ℃. It adopts visual aiming, optical dial reading, and temperature digital display, which is simple and reliable. The base is made of stainless steel, and the prism is made of hard glass, which is not easy to wear. The main technical parameters Refractive index measurement range (nD): 1.3000-1.7000 Accuracy (nD): 0.0003 (estimated reading) The mass fraction of sucrose solution (Brix) reading range: 0~95% Telescope magnification: 2× Reading magnification: 22×