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  2. Relative density - Wikipedia

    en.wikipedia.org/wiki/Relative_density

    Relative density, also called specific gravity, [1] [2] is a dimensionless quantity defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for solids and liquids is nearly always measured with respect to water at its densest (at 4 °C or 39.2 °F); for gases, the ...

  3. Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Hydrometer

    The grain diameter thus can be calculated from a knowledge of the distance and time of fall. The hydrometer also determines the specific gravity (or density) of the suspension, and this enables the fraction of particles of a certain equivalent particle diameter to be calculated. [22]

  4. 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 ...

  5. API gravity - Wikipedia

    en.wikipedia.org/wiki/API_gravity

    Light crude oil has an API gravity higher than 31.1° (i.e., less than 870 kg/m 3) Medium oil has an API gravity between 22.3 and 31.1° (i.e., 870 to 920 kg/m 3) Heavy crude oil has an API gravity below 22.3° (i.e., 920 to 1000 kg/m 3) Extra heavy oil has an API gravity below 10.0° (i.e., greater than 1000 kg/m 3)

  6. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    AGT – (2) authorised gas tester (certified by OPITTO) AGT – (3) Azerbaijan – Georgia – Turkey (a region rich in oil related activity) [3] AHBDF – along hole (depth) below Derrick floor; AHD – along hole depth; AHU – air handling unit; AICD – autonomous inflow control device; AIChemE – American Institute of Chemical Engineers

  7. Refractometer - Wikipedia

    en.wikipedia.org/wiki/Refractometer

    Gemstone refractometers are available both as classic optical instruments and as electronic measurement devices with a digital display. [3] In marine aquarium keeping, a refractometer is used to measure the salinity and specific gravity of the water. In the automobile industry, a refractometer is used to measure the coolant concentration.