An instrument for determining the refractive index of a substance. Also, aware about the concentration and the freshness. It can also be used for measuring of soy milk concentration in the range from 0 to 25%.
Aluminium and rubber over handle as grip
0-10%, 0-18%, 0-32%, 28-62%, 58-92%, 0-55%, 45-82%, 0-80%, 0-90%, 0-100%
20 CM (standard) & different sizes