Product Material: metal + plastic Measuring range: 0-80%. Minimum unit: 1% Accuracy: 1% Reference temperature 20C Accessories: 1 *Measuring instrument 1 * pipette, 1 * cleaning cloth, 1 * screwdriver 0 - 80% brix sugar refractometer, is also an essential instrument for checking emulsions and grinding solutions. Easy to use. Place 2-3 drops sample on the main Prism and close the panel and hold the refractometer up to the light and look through the eyepiece. Precision measurement: High quality, zero line adjustable (Blue/White), easy to read (daylight visible), adjustable eyepiece to focus adjustment. Calibration: zero calibration with the distilled water at 20 C, automatic temperature compensation between 10 C and 30 C (ATC).