Hydrometer A.S.T.M.E100 General Purpose

Standardized U.S.A Hydrometers
A.S.T.M. E100 (General Purpose)

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A2LA Traceable hydrometers.
Graduated in Specific Gravity.
Calibration temperature : 60/60°F ( 15.56°C)
Reading below meniscus.

These hydrometers are manufactured according to the American standards from the last ASTM E100 Committee of the AMERICAN SOCIETY FOR TESTING AND MATERIAL.
They are calibrated according to the following surface tensions:
from 0.600 to 1.000 Sp.Gr.= 16 at 35 mN/m (low tension)
from 1.000 to 1.300 Sp.Gr.= 55 mN/m (medium tension)
from 1.300 to 2.000 Sp.Gr.= 75 mN/m (high tension)

The scale of the hydrometer is fully marked with all the reference norms, the calibration temperature, the surface tension, the individual number of the instrument, the serial number and the ALLA FRANCE logo.
When an ASTM hydrometer has an equivalent ISO 650 hydrometer, both standards are printed on the back of the instrument.
A benchmark is engraved on the stem to show any displacement of the scale.