This instrument Can Widely be used in petroleum, chemical, pharmaceutical, sugar refining and food industries as well as in related colleges, universities and scientific research institutions for measuring the refractive index ND of transparent or sub transparent liquid, or solid substance. This instrument can also be used to measure Brix (BX) of the sugar solution, and to correct the effect of temperature on the Brix automatically. In addition the instrument can display the temperature of the sample. Complete with: 1 x standard sample (standard block), 1 x bottle Nephthalenebromide, 1x inner-hexagon spanner, 3x Illuminating Bulb, 1 x Plastic Cover Hood, 3 x fuse, 1 x operating instructions.