LABSOUL Glassware/Soil Glass Hydrometer/Specific Gravity Range: 0.995 to 1.030 Hydrometer

Hydrometer is the name given to the measuring instrument used to measure the specific gravity of liquids. The hydrometer, which is made of glass, has a weight at one end to keep it upright in the liquid, and a cylindrical handle at the other end. The liquid to be measured is placed in a thin long container, then the hydrometer is slowly left in this container so that it floats freely.