Alcohol, Spirit and Beer Refractometers

A refractometer is a device that measures the total concentration of liquids using the refraction of light. As distilled beverages consist mainly of alcohol and water, the concentration of alcohol can be measured by a refractometer. Brewed beverages contain also sugar. Measuring them without distilling will give an inaccurate reading, as the value of sugar will be added to that of alcohol. Please distill brewed beverages before measuring