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    Hydrometer - Wikipedia

    • A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity. A hydrometer usually consists of a sealed hollow glass tube with a wider bottom portion for buoyancy, a ballast such as le… See more

    History

    The hydrometer probably dates back to the Greek philosopher Archimedes (3rd century BC) who used its principles to find the density of various liquids. An early description of a hydrometer comes from a Latin poem… See more

    Ranges

    The hydrometer sinks deeper in low-density liquids such as kerosene, gasoline, and alcohol, and less deep in high-density liquids such as brine, milk, and acids. It is usual for hydrometers to be used with dense liqui… See more

    How to Read a Hydrometer: 15 Steps (with Pictures) - wikiHow
    A hydrometer is a measurement tool, usually made from a weighted glass tube, used to test the density of a liquid. The idea behind the hydrometer is that suspending a solid object in a liquid wil…
    WikiHow · https://www.wikihow.com/Read-a-H…
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