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Hydrometers
Hydrometer for seawater 1.000-1.030 : 0.002 Sp-Gr temp.25/4°C
Hydrometer for seawater 1.000-1.030 : 0.002 Sp-Gr temp.25/4°C with thermometer
Hydrometer for seawater 1.016-1.028 : 0.0005 Sp-Gr temp.25/4°C with thermometer