Etekcity 0.2% Accuracy Sugar Refractometer Tester Built In Automatic Temperature Compensation (ATC) with Carry Case: Great for Measuring Testing Dissolved Solids in Fruits, Veggies, and Grasses. Great for the testing the amount of sugars and dissolved solids in Fruits, Vegetables, and Grasses; Easy and simple to use; No tools are needed for calibration Used in wine and beer making, to get just the right concentration of sugars; More accurate and faster than your homebrew Hydrometer Built-in automatic temperature compensation system from 0 to 30 degrees Celsius Gives accurate readings with as little as 2 drops of solution per test Brix (sugar) range of 0  32 brix; Resolution 0.2%; Accuracy 0.2%