Specific Gravity Hydrometer

Vtg Buame & Specific Gravity Scale Hydrometer API Thermometer Lot Of 19

ASTM 6H Hydrometer 49/61 API, 0.1 Div. 330mm

Vintage glass Ertco ASTM 128 H 60 degree Specific Gravity Hydrometer

Precision Hydrometer Specific Gravity Fir Heavy Liquid

Vintage Baume & Specific Gravity Hydrometer For Heavy Liquids - W.H. Curtin

Chase 1911 Specific Gravity Hydrometer, light liquids, 0.800 to 0.910 mm

1.000 to 1.220 Specific Gravity Baume Scale For Heavy Liquids 60F Hydrometer