Nowadays, fast and precise density measurements of fluids are mostly performed using so-called oscillation-type density meters, able to measure in a very wide interval of temperature and pressure. This work aimed to developed, characterized and validated a high-pressure density measurement (HPDM) apparatus ensuring the traceability to SI of density measurements performed with these devices at high pressure (up to 650 bar) with a relative uncertainty of 8.0 10-4. The developed HPDM apparatus and methodology are found to be suitable to be used for calibration purposes, as recommended by the standard ASTM D7961, fulfilling this existing gap in density traceability chain.

中文翻译：

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用于液体高压密度测量的新装置

如今，流体的快速而精确的密度测量大多使用所谓的振荡式密度计进行，能够在很宽的温度和压力范围内进行测量。这项工作旨在开发、表征和验证高压密度测量 (HPDM) 设备，确保在高压（高达 650 巴）下使用这些设备执行的密度测量可追溯至 SI，相对不确定度为 8.0 10-4。发现开发的 HPDM 设备和方法适用于校准目的，如标准 ASTM D7961 所推荐的那样，填补了密度可追溯链中的这一现有空白。