An ebulliometer provides one of the easiest methods of determining the alcohol content in wine. The test is based on the difference in boiling points of water and wine, and the ebulliometer provides a very accurate measure of these factors. Distillation methods are slightly more accurate, but require more time. The ebulliometer will not give an accurate reading for wines with high residual sugar levels, and these wines must first be distilled or diluted with water and the result factored. www.shop.piwine.com