This alcohol meter gives a very accurate reading. Read the alcohol percentage. Check the temperature of the thermometer. For every 1C over 20C, decrease the alcohol content with 0.2%. For every 1C under 20C, increase the alcohol content with 0.2%. Length 30 cm.

Note: this calculation only works for this alcohol meter. Because alcohol meters have different lengths, weight and widths, there are individual correction tables for each of them.