Real Instruments 0-32% Brix Hand Refractometer With ATC For Measuring Fruits Wine Beer Sugars Manual Handheld Refractometer

Refractometer is a laboratory or field device for the measurement of an index of refraction (refractometry). The index of refraction is calculated from the observed refraction angle using Snell's law. For mixtures, the index of refraction then allows to determine the concentration using mixing rules such as the Gladstone–Dale relation and Lorentz–Lorenz equation.