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ACCURATE BREWING CONTROL Achieve precise control of your brewing process by accurately measuring the sugar content in the original grape juice. The wine refractometer is mainly used to test the sugar content of the original grape juice and then determine the potential alcohol content of wine (fermented grape juice). It cannot be used to measure the alcohol content of wine. DOUBLE SCALE MEASUREMENTS The wine refractometer provides double scale values for sugar content in Brix (0-40%) and alcohol content (0-25% vol). With this alcohol percentage meter, you can precisely monitor and adjust your brewing process. EASY OPERATION This refractometer makes testing easy and hassle-free. Simply drip 2-3 drops of water on the prism, calibrate it to \