National Standard for the Density of Liquids and Solid Bodies

The transfer of the density unit is realized using the hydrostatic weighing method, transferring density values from silicon spheres to liquids or solid bodies. The reference density value, used for the calibration of reference liquid densities, is based on solid body standards, primarily 500 g and 1000 g silicon spheres.

Importance of Liquid Density Measurement

The density of liquids is a crucial parameter in various fields. The National Standard for Density serves as the reference for measuring instruments used in:

• Chemical and petrochemical industries
• Automotive industry
• Pharmaceutical and food industries
• Customs administration
• Slovak Armed Forces
• Certified Reference Materials (CRM) for density

Calibration of Mass Standards and Reference Values

For mass standard calibration, the reference density value is the tabulated density of redistilled water, determined under defined conditions.

• At 20°C and atmospheric pressure of 101.325 kPa, the density of redistilled water is 998.2067 kg/m³.

Operating Range of the National Density Standard

The standard is applied within the following ranges under the current conditions of the Mass and Density Laboratory:

• Liquids:

  • Density range: 600 kg/m³ to 2000 kg/m³
  • Temperature range: 5°C to 40°C

• Solid bodies:

  • Density range: 1000 kg/m³ to 21500 kg/m³
  • Temperature range: 15°C to 30°C

Documents for download

• Osvedčenie (certifikát) (pdf, 1.1 MB)