标准号:ISO 649-1-1981
中文标准名称:实验室玻璃器皿 通用密度计 第1部分:规范
英文标准名称:Laboratory glassware; Density hydrometers for general purposes; Part 1 : Specification
标准类型:N51
发布日期:1999/12/31 12:00:00
实施日期:1999/12/31 12:00:00
中国标准分类号:N51
国际标准分类号:71.040.20
适用范围:The requirements for basic series and sub-series of glass hydrometers of constant mass without built-in thermometer are specified. They are graduated to indicate density at 20 degrees centigrade and 15 degrees centigrade, respectively. Standard categories of surface tension are tabled in annex A, recommended stem diameters in annex B.