Density, Relative Density (Specific Gravity) or API Gravity

• Conforms to ASTM E100 and related international standards

• High-precision glass construction for accurate and repeatable readings

• Available in API Gravity, Specific Gravity, and Metric configurations

• Standard reference temperature: 60°F (15°C) for petroleum testing

• Multiple subdivisions for fine measurement accuracy

• Thermohydrometer models include integrated thermometers for temperature compensation

• Compatible with major ASTM and ISO test methods for petroleum density measurement

• Ideal for crude oil, fuel oils, lubricants, and petrochemical samples

• Traceable calibration certificate included with each instrument

Precision-built to ASTM E100, trusted worldwide for accurate density and API gravity determination.
The ASTM Hydrometers deliver reliable, traceable results for all petroleum and liquid hydrocarbon testing applications. Available in API, specific gravity, and thermometric models, they are essential tools for refineries, QA labs, and fuel analysis facilities requiring standard-compliant and repeatable measurements.

• Crude Oil Testing – API gravity and density verification for refinery input

• Fuel Quality Control – Monitor blending ratios and product conformity

• Lubricant & Additive Testing – Ensure consistency in formulation

• Petrochemical Processing – Density measurement for raw materials and intermediates

• Storage & Distribution – Verify shipment and storage integrity

• Calibration Laboratories – Standard reference for density measurement devices