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Norm

ISO 649-1:1981

Issue date: 1981 08 01

Laboratory glassware — Density hydrometers for general purposes — Part 1: Specification

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 ...
Withdrawn: 2023 02 15
Publisher:
International Organization for Standardization
Format:
Digital | 9 Pages
Language:
English

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.