StayRite Hydrometer and Floating Thermometer!

These hydrometers have a directional device which stops the instrument from moving, with the part of the scale you read facing you.

ASTM55HLThermohydrometer

Used in the petroleum industry
for refining crude oil into gasoline, fuel oil, etc.

Specific Gravity Light Hydrometer

Used in the chemical industry for liquids that are lighter than water.

Triple Scale Beer and Wine Hydrometer

Used by homebrewers and home winemakers to record starting and finishing specific gravity during fermentation.

ASTM84H

Used in both the petroleum industry and the chemical industry where precise measurements are necessary.