Waterproof Digital Refractometer - SugarsCover the entire 0 ~ 88% brix range with one instrument along with ND (refractive index), temperature and dextran, fructose, glucose, lactose, and maltose scales. Housed in a protective rubberized IP65 waterproof case to safeguard the electronics from wet environments and makes for easy clean ups. A scratch proof sapphire lens ensures continued accuracy over time. Measure samples as small as 1 ml, in the field with laboratory accuracy. Sample