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  2. Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Hydrometer

    Schematic drawing of a hydrometer. The lower the density of the fluid, the deeper the weighted float B sinks. The depth is read off the scale A.. A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy.

  3. Elevator paradox (physics) - Wikipedia

    en.wikipedia.org/wiki/Elevator_paradox_(physics)

    The elevator paradox relates to a hydrometer placed on an "elevator" or vertical conveyor that, by moving to different elevations, changes the atmospheric pressure. In this classic demonstration, the floating hydrometer remains at an equilibrium position. Essentially, a hydrometer measures specific gravity of liquids independent of barometric ...

  4. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    hydrometer: specific gravity of liquids (density of liquids) hygrometer: humidity inclinometer: angle of a slope inkometer: ink interferometer: wave interference infrared thermometer: heat radiated katharometer: composition of gases lactometer: specific gravity of milk light meter: light (in photography) linear position transducer: speed of ...

  5. Baumé scale - Wikipedia

    en.wikipedia.org/wiki/Baumé_scale

    The relationship between specific gravity (s.g.; i.e., water-specific gravity, the density relative to water) and degrees Baumé is a function of the temperature. Different versions of the scale may use different reference temperatures.

  6. Talk:Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Talk:Hydrometer

    However it cannot be said they measure specific gravity (disregarding the gradation) since specific gravity is based on the density of a reference of which any given hydrometer is not unless it is designated a reference such as the kilogram mass. It should be worded clearly as to differentiate relative density as used in the principle and in ...

  7. Density meter - Wikipedia

    en.wikipedia.org/wiki/Density_meter

    A density meter does not measure the specific gravity of a sample directly. However, the specific gravity can be inferred from a density meter. The specific gravity is defined as the density of a sample compared to the density of a reference. The reference density is typically of that of water. The specific gravity is found by the following ...

  8. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    In the hydrometer tests, the soil particles are mixed with water and shaken to produce a dilute suspension in a glass cylinder, and then the cylinder is left to sit. A hydrometer is used to measure the density of the suspension as a function of time. Clay particles may take several hours to settle past the depth of measurement of the hydrometer.

  9. Soil texture - Wikipedia

    en.wikipedia.org/wiki/Soil_texture

    The hydrometer method of determining soil texture is a quantitative measurement providing estimates of the percent sand, clay, and silt in the soil based on Stokes' law, which expresses the relationship between the settling velocity and particle size. [11] According to this law the particles settle down because of the weight and gravity action.

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