Spirit producers have to use an alcoholometer in accordance with recommendation R44 (edition 1985) of the International Organization of Legal Metrology (OIML) to determine the alcohol content of their spirits and ethanol mixtures. It determines both the alcohol content expressed as a volume percent and the temperature of the mixture in degrees Celsius. Given that the alcohol content changes depending on the temperature, the strength always has to be given at the reference temperature of 20 °Celsius.
Alcohol calculation program for PCs and app for iPhones and Android smartphones
There is an alcohol calculation program for PCs and an app called Calco for quick and reliable conversions. The program is available for download below, and the operating instructions are also provided.
Verification with an XML interface
Thanks to an XML interface, the verification program can easily be integrated in other applications. The data has to be entered in an XML file for the calculation, added to the program and then the calculation started. The calculated values are shown like the entered data in an XML file, and further processing is thus simple.
The alcoholometric tables are used to determine the alcohol content by percent mass, by percent volume as well as by density. METAS is responsible for the publication of the alcoholometric tables in electronic form.