For use in determining ethyl alcohol content of liquids. Graduated scale in percent by volume (Tralle) and twice the percent by volume (Proof). 0-100 Tralle with 1% subdivisions and 0-200 proof with 2% subdivisions. Standardized at 60°F.
Thermometer is not included with 569-500-11. Thermohydrometer range is 30°-100°F.