This Standard specifies alcohol hydrometers used in transaction or certification in Japan (hereafter referred to as "hydrometers") marked with scales indicating the alcohol concentration in mixed solution of alcohol and water at the temperature 15 ℃ by vol% of a defined concentration range within 0 vol% to 100 vol%, and that of 0.1 vol%, 0.2 vol% and 0.5 vol% in scale interval.