A floating device used to determine the specific gravity or density of liquids.
A device used to determine the specific gravity of liquid by comparison to water.
An instrument that measures the density of a liquid by the depth to which a graduated scale sinks into the liquid.
An enclosed glass cylinder constructed to buoyantly rest within a liquid mixture, specifically employed for ascertaining the presence of excessive concentration or dilution in chemical blends.
A device employed to determine the density of liquids.