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Roles of CIPM and IAPWS Standards for the Density of Water



Allan H. Harvey, R Span, K Fujii, M. Tanaka, Richard Davis


This contribution discusses the relative roles of the standard formulation for the density of liquid water recommended for metrology by the International Committee for Weights and Measures (CIPM) and the thermodynamic property formulation adopted by the International Association for the Properties of Water and Steam (IAPWS) in 1995. The two formulations give consistent results for densities in the region of validity of the CIPM standard. Guidelines are presented for the appropriate use of the two formulations.


CIPM, density, IAPWS, metrology, water


Harvey, A. , Span, R. , Fujii, K. , Tanaka, M. and Davis, R. (2009), Roles of CIPM and IAPWS Standards for the Density of Water, Metrologia (Accessed July 20, 2024)


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Created February 24, 2009, Updated February 17, 2017