A hydrometer is a device used to measure the specific gravity or density of a liquid relative to the density of water. It typically consists of a long, narrow glass tube with a weighted bulb at the bottom and a scale marked along the stem.
When a hydrometer is placed in a liquid, it floats, and the depth to which it sinks is proportional to the density of the liquid. Hydrometers are commonly used in various industries, including brewing, winemaking, and automotive, to determine the concentration or strength of solutions, such as alcohol content, sugar content, or battery acid density.
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