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Homepage>ISO Standards>ISO 649-1:1981-Laboratory glassware-Density hydrometers for general purposes-Part 1: Specification

ISO 649-1:1981

Laboratory glassware

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Standard´s number:	ISO 649-1:1981
Pages:	9
Edition:	1
Released:	1981
Language:	English

DESCRIPTION

ISO 649-1:1981

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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