Density, Relative Density
(Specific Gravity),
or API Gravity of Crude Petroleum and
Liquid Petroleum Products by
Hydrometer Method
ASTM HYDROMETERS
For density, relative density (specific gravity) or API gravity
determination of crude petroleum, liquid petroleum products
and mixtures of petroleum and non-petroleum products.
Conforming to the specifications of:
ASTM E100
Applicable Test Method Standards:
ASTM D287, D1298, D6074, D6158;
API MPMS Chapter 9.1; IP 160; ISO 3675; DIN 51757
API GRAVITY HYDROMETERS
Standard temperature 60°F, subdivisions 0.1° API,
length 330mm
SPECIFIC GRAVITY HYDROMETERS
Standard temperature 60/60°F, subdivisions 0.0005,
length 330mm
![](images/petro-division/API-gravity-2.jpg)