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On this scale, a specific gravity of 1.000 is reported as 0, and a specific gravity of 2.000 is reported as 200. [1] For example, concentrated sulfuric acid with a specific gravity of 1.8 has a Twaddell scale measurement of 160, reflecting the linear relationship between readings and specific gravity. The Twaddell scale is used exclusively for ...
A hydrometer calibrated to read specific gravity relative to water at 60 °F (16 °C) is a standard tool for servicing automobile batteries. Tables are used to correct the reading to the standard temperature.
Before standardization on specific gravity around the time of World War II the Baumé scale was generally used in industrial chemistry and pharmacology for the measurement of density of liquids. Today the Baumé scale is still used in various industries such as sugar beet processing , ophthalmics, starch industry, winemaking, industrial water ...
A United States Navy Aviation boatswain's mate tests the specific gravity of JP-5 fuel. 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.
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.
The hydrometer analysis uses the rate of sedimentation to determine particle gradation. [13] R-Value test California Test 301 This test measures the lateral response of a compacted sample of soil or aggregate to a vertically applied pressure under specific conditions. This test is used by Caltrans for pavement design, replacing the California ...
I'm surprised that this article does not mention the hydrometer's use in measuring the specific gravity of freshwater or saltwater marine aquariums, especially considering that this is no doubt the most popular home-consumer use for the device. — Preceding unsigned comment added by 76.110.212.12 02:00, 18 August 2011 (UTC)
specific gravity of liquids densitometer: degree of darkness in photographic or semitransparent material diffractometer: structure of crystals dilatometer: volume changes caused by a physical or chemical process disdrometer: size, speed, and velocity of raindrops dosimeter: exposure to hazards, especially radiation; radiation of item drumometer