2010UNE-EN ISO 15212-2:2002/AC:2010 Oscillation-type density meters - Part 2: Process instruments for homogeneous liquids (ISO 15212-2:2002/Cor 1:2008)
2003UNE-EN ISO 15212-2:2003 Osscilation-type density meters. Part 2: Process instruments for homogenous liquids. (ISO 15212-2:2002)