【Professional】is an instrument used to measure the ND refractive index and average NF-NC transparent or translucent liquid or solid NF-NC (mainly using transparent liquid). Measurement system: detection of critical angle of light refractive refraction. 【Adjustable】The handwheel adjusts the refractive index scale, rotates to adjust the refractive index, and light rays enter the instrument through the light prism, so that it is clear. 【High Quality】With visual alignment, optical proportional reading, digital temperature display, high resolution prism, good air permeability, data is clearly visible. The thermostat is more accurate, more convenient and more reliable. 【Measurement Range】Including the optical properties, purity, concentration and dispersion of the substance. The instrument can measure the percentage of sugar in the sugar solution concentration (0~95%, refractive index ND 1.3-1.7). 【Wide Application】It is widely used in the petroleum industry, pharmaceutical industry, construction coating industry, food industry, daily chemical industry, experiment, scientific research and teaching, sugar industry, geological survey plants, etc.