Measure.Ratio.DensityMass

MeasureMass

Test Process that measures the relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest (at 4 °C or 39.2 °F); for gases, air at room temperature (20 °C or 68 °F) is the reference. The term “relative density” is often preferred in scientific usage. It is defined as a ratio of the density of a particular substance with that of water.

Result

Name	Quantity	m-layer aspect
Ratio	ratio	—

Parameters

Parameter	Required	Quantity	m-layer aspect	Definition or allowed values
DensityRatio	Required	ratio	—	{kg·m3/kg·m3 g·cm3/g·cm3, lb·ft3/lb·ft3}
ReferenceMaterial	Required	—	—	{Water , Air}
Temperature	Required	temperature	thermodynamic-temperature (AS101)	—
Pressure	Optional	pressure	pressure (AS14)	—
Volume	Optional	volume	volume (AS37)	—

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