Density and density
Hydraulic fluids - Analysis methods
Article REF: BM6017 V1
Density and density
Hydraulic fluids - Analysis methods

Author : Gérard DALLEMAGNE

Publication date: October 10, 2003 | Lire en français

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1. Density and density

  • Density

    The density of a liquid at a given temperature is the mass per unit volume. It was formerly known as "specific mass". It is measured at 15°C and expressed in kg/m 3 .

    Various methods are used to characterize it.

    • Direct measurement with a hydrometer, applying Archimedes' principle, as illustrated in figure 1 . The volume immersed is inversely proportional to the density. This method is covered by the following standards: NF EN ISO 3675 and ASTM D 1298 (cf. ).

    • Picnometer measurement, which involves weighing a given...

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