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ISO 2449:1974 [ Withdrawn ]
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ISO 2449:1974 Milk and liquid milk products -- Density hydrometers for use in products with a surface tension of approximately 45 mN/m
standard by International Organization for Standardization, 03/01/1974
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Full Description
This International Standard gives specifications for glass hydrometers of constant mass, for use in milk and liquid milk products with a surface tension of approximately 45 mN/m, which indicate density (g/ml) at 20 C (27 C in tropical countries).
Two types of hydrometers are specified, a precision type and a wide-range type, which comply in all important respects with lSO/R 387.
Notes on the verification of the hydrometers are given in annex A, a suitable hydrometer cylinder is described in annex B and a suitable thermometer is described in annex C.