ISO 649-1:1981
International Standard
Historical
·
Approved on
01 August 1981
Laboratory glassware — Density hydrometers for general purposes — Part 1: Specification
ISO 649-1:1981 Files
English
9 Pages
Historical
31.45 OMR
ISO 649-1:1981 Scope
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.
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