Hydrometer is an instrument, which is used for measuring the specific gravity of liquids. A hydrometer is a weight with a vertical scale attached. When placed into a liquid, the hydrometer bobs upright, and sinks to a certain level. The specific gravity or solution composition can be read from the liquid level on the vertical scale. Hydrometers have many uses, it is most commonly used by wine, beer, and a mead maker in determining the alcohol content of a homemade beverage. Hydrometers are also used to test batteries by measuring the percentage of sulfuric acid in the battery electrolyte in terms of specific gravity. Thus it has many other uses too.
there are different types of hydrometers, which is used for different industrial and commercial purposes.
