石油产品手持式数字密度计DA-130N 试验方法标准:

ASTM D7777 - 13 Standard Test Method for Density, Relative Density, or API Gravity of Liquid Petroleum by Portable Digital Density Meter.(用便携式数字密度计测定液体石油密度、相对密度或API比重的试验方法)。

IP 559 - 2012?Determination of density of middle distillate fuels - Hand held oscillating U-tube density meter method.(中间馏份燃料 手持振荡U形管密度计法)。