When allowed to float free in beer & wine it gives a reading of the liquids specific gravity.
Beer & Wine Triple Scale Hydrometer - Saccharimeter, Beer & Wine Alcohol
Triple Scale Hydrometer - Saccharimeter, Beer & Wine Alcoholmeter
Stevenson-Reeves Triple Scale Hydrometer For Wine & Beer Easy To Read Homebrew
Triple Scale Wine & Beer Hydrometer
One Set Triple Scale Alcohol Hydrometer and Test Jar for Home Brew Wine
Triple Scale Hydrometer for Wine & Beer Making (S1011)
