API Thermo Hydrometer
Manufactured to ASTM specifications, these units have become the industry standard for close, accurate readings. Suitable for certification and as such serve as primary reference standards in many government and private laboratories. Temperature range is 0 to 150 F degrees with 2 degree divisions.
API Chapter 9.3 of the MPMS ASTM D and E100. These instruments combine API gravity scale with a thermometer in the body and are the standard and preferred size normally used for determining the gravity of crude oil and other liquid petroleum products.
Length:15 inch (374 to 387 mm)
Diameter: ¾ to 1 inch (18 to 25 mm)
Thermometer Range: 0 to 150 F
51HL API -1/11 0.1 DIV, 0/150F, 2.0 DIV
52HL API 9/21 0.1 DIV, 0/150F, 2.0 DIV
53HL API 19/31 0.1 DIV, 0/150F, 2.0 DIV
54HL API 29/41 0.1 DIV, 0/150F, 2.0 DIV
55HL API 39/51 0.1 DIV, 0/150F, 2.0 DIV
56HL API 49/61 0.1 DIV, 0/150F, 2.0 DIV
57HL API 59/71 0.1 DIV, 0/150F, 2.0 DIV
58HL API 69/81 0.1 DIV, 0/150F, 2.0 DIV
59HL API 79/91 0.1 DIV, 0/150F, 2.0 DIV
60HL API 89/101 0.1 DIV, 0/150F, 2.0 DIV
API Gravity Measurement: A Definition
The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water: if its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks.
API gravity is an inverse measure of a petroleum liquid's density relative to that of water. It is used to compare densities of petroleum liquids. For example, if one petroleum liquid is less dense than another, it has a greater API gravity. Although API gravity is mathematically a dimensionless quantity, it is referred to as being in 'degrees'. API gravity is graduated in degrees on a hydrometer instrument. API gravity values of most petroleum liquids fall between 10 and 70 degrees.
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