... refraction principle design.has the smart appearance, easy to use, can put in pocket. LCD large screen digital ... numerical value judgment . It is almost can used for all fruit juice, food and beverage, etc liquid ... The series refractometer in different model can respectively used for test the Refractive index, BaiLi degrees brix,, salinity, ... 0.10%±0.3% Digital Refractometer For Oe (Oe Switzerland 0~150)