It’s the ratio of the weight of a cake batter in a container compared to the weight of water in the same container. It shows the amount of aeration, or air movement, in specific batters, allowing bakers to determine if it is too dense or not. Although specific gravity is still frequently used, this traditional term is not used under the SI system it has been replaced by “relative density. Specific Gravity is a way to measure the air added into cake batter. By convention, specific gravities of all gases at all pressures are usually set equal to the ratio of the molecular weight of the gas to that of air (28.967). ![]() The ideal gas laws can be used to show that the specific gravity (ratio of densities) is also equal to the ratio of the molecular weights. However, slightly different standards are sometimes used in different locations and in different units. The standard temperature is usually 60☏, and the standard pressure is usually 14.696 psia. Specific gravity (S.G.) is a measure of the relative density of a substance as compared to the density of water at a standard temperature. The term can also refer to the ratio of the density of a gas to the density of dry air at standard temperature and pressure, although this specification is less often used. In the International System of Units (SI Units), the density of water is 1.00 g/cm 3 at the standard temperature. Physicists use 39.2 F (4 C) as the standard, but engineers ordinarily use 60 F. The specific gravity of a gas, γ, is the ratio of the density of the gas at standard pressure and temperature to the density of air at the same standard pressure and temperature. specific gravity: The term specific gravity, symbolized sp gr, refers to the ratio of the density of a solid or liquid to the density of water at 4 degrees Celsius. Specific gravity (S.G.) is a measure of the relative density of a substance as compared to the density of water at a standard temperature. ΡH2O = density of water – normally at temperature 4 oC Ρsubstance = density of the fluid or substance Densimeter - Specific Gravity Tester is an advanced Density testing equipment for measuring solid and liquid samples with high precision sensor and auto-weighing function. ![]() At a specified temperature and can be expressed as Specific Gravity (Relative Density) SG also called relative density that is ratio of the density of a substance to that of a standard substance.
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