First density comparison on viscoelastic samples by oscillation-type densimetry


  • A. Furtado Instituto Português da Qualidade (IPQ)
  • J. Pereira Instituto Português da Qualidade (IPQ)
  • R. Quendera Instituto Português da Qualidade (IPQ)
  • M. Schiebl Physikalisch Technischer Prüfdienst des Bundesamtes für Eich und Vermessungswesen (BEV-PTP)
  • E. Lenard Central Office of Measures (GUM)
  • E. Malejczyk Central Office of Measures (GUM)
  • A. Alic Institut za mjeriteljstvo Bosne i Hercegovine (IMBiH)
  • S. Alisic Institut za mjeriteljstvo Bosne i Hercegovine (IMBiH)
  • J. Rauch Physikalisch Technische Bundesanstalt (PTB)
  • F. Lorenz Physikalisch Technische Bundesanstalt (PTB)
  • A. Bescupschii I. P. Institutul National de Metrologie (INM)
  • A. Ciubara I. P. Institutul National de Metrologie (INM)
  • B. Laky Anton Paar GmbH
  • R. Amsüss Anton Paar GmbH



To provide a deeper insight about the damping effects produced by the viscoelasticity of non- Newtonian fluids during density measurements with oscillation-type density meters, and about how reference laboratories overcome these effects, an international comparison was performed, within the scope of the EMPIR Project 17RPT02 rhoLiq. The results of the comparison evidenced the possibility to measure density of viscoelastic samples by means of oscillation-type density meters with an uncertainty between 0.10 kg·m-3 and 0.25 kg·m-3. However, these instruments may be able to reach lower uncertainties if compared with higher precision density measurement methods such as hydrostatic weighing.