The Ceti DIGIT-080 Sugar Hand Held Analogue Refractometer is a lightweight sugar pocket refractometer used for measuring high sugar concentrations (except in juices, honey, jam, syrup or canned food). This laboratory refractometer features a main and secondary glass prism fixed with a chemically resistant epoxy and focusing eyepiece with soft rubber eyecup. Features This refractometer has a main glass prism fixed with a chemically resistant epoxy and focusing eyepiece with a soft rubber eyecup. Specification Scale (%): 0 – 80 (Brix) Precision (%): 0.5 (Brix) Prism Cover: Metal Dimensions (mm): 55 x 80 x 225 Weight (g): 180 Calibration: Zero calibration with distilled water at 20°C