Hydrometers measure the specific gravity of liquids or soil grains that are too fine for sieve analysis. The free floating device features a cylindrical stem with a ballast bulb bottom. Weighted with metal instead of lead or mercury, users simply read the graduated measurement at the meniscus. Optically clear for exact conclusions, hydrometers may come calibrated for specific tests. Range subdivisions and accuracy levels differ among the relative density analyzing instruments.
Sea Water Hydrometers
Supplier: G & W Instruments
Measures specific gravity from 1.0–1.07 SG.
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Universal Hydrometer
Supplier: G & W Instruments
Graduated for specific gravity and both Baume scales.
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GOLD BRAND ASTM/API High Precision Combined Form Hydrometer, Thermco
Supplier: Thermco
High precison ASTM-like combined form hydrometers made to exceed ASTM and API specifications, which incorporate a thermometer in the hydrometer
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ASTM/API Precision Combined Form +30/180 ºF Hydrometer, Thermco
Supplier: Thermco
Precison ASTM-like combined form hydrometers made to meet ASTM and API specifications, which incorporate a thermometer in the hydrometer
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API Precision Combined Form Hydrometer, Thermco
Supplier: Thermco
Precison API combined form hydrometers made to meet API specifications, which incorporate a thermometer in the hydrometer
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ASTM Specific Gravity Hydrometers
Supplier: Heathrow Scientific
Our ASTM specific gravity hydrometers are calibrated at 60 °F and manufactured to the specifications of the American Society for Testing and Materials (ASTM).
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Wide-Range Specific Gravity Hydrometers
Supplier: Heathrow Scientific
These wide range specific gravity hydrometers are ideal to use when you aren't sure of the approximate value of your liquid. These refractometers can also be used for measuring multiple liquids with different specific gravity amounts.
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Universal Laboratory Hydrometer
Supplier: Wards
Measures specific gravity range of 0.700 to 2.000 with 0.01 graduations and dual scale for light and heavy liquids.