Hydrometers, BS718 series. Density g/ml at 20oC. Adjusted for liquids of medium surface tension. Series S50 (50o range). Length 190mm. Subdivision 0.002.
Hydrometers, BS718 series. Density g/ml at 20oC. Adjusted for liquids of medium surface tension. Series S50 (50o range). Length 190mm. Subdivision 0.002.