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The American Society for Testing and Materials (ASTM) Specification E 100 describes hydrometers using the API (American Petroleum Institute) scale and others in degrees Specific Gravity.
330mm Long Plain Hydrometers – American Petroleum Institute API Scale
adjusted at 60°F for Petroleum Products and other liquids of low surface tension.
Sizes and Specifications
ASTM Hydrometer No
Range API Scale
Subdivision
Product No
ASTM 1H
-1 to 11
0.1°
09/001/0
ASTM 2H
9 to 21
0.1°
09/002/0
ASTM 3H
19 to 21
0.1°
09/003/0
ASTM 4H
29 to 41
0.1°
09/004/0
ASTM 5H
39 to 51
0.1°
09/005/0
ASTM 6H
49 to 61
0.1°
09/006/0
ASTM 7H
59 to 71
0.1°
09/007/0
ASTM 8H
69 to 81
0.1°
09/008/0
ASTM 9H
79 to 91
0.1°
09/009/0
ASTM 10H
89 to 101
0.1°
09/010/0
330mm Long Plain Hydrometers – Specific Gravity Scale
adjusted at 60°F for Petroleum Products and other liquids of low surface tension.
Sizes and Specifications
ASTM Hydrometer No
Range °SG
Subdivision
Product No
ASTM 82H
0.650 to 0.700
0.0005°
09/082/0
ASTM 83H
0.700 to 0.750
0.0005°
09/083/0
ASTM 84H
0.750 to 0.800
0.0005°
09/084/0
ASTM 85H
0.800 to 0.850
0.0005°
09/085/0
ASTM 86H
0.850 to 0.900
0.0005°
09/086/0
ASTM 87H
0.900 to 0.950
0.0005°
09/087/0
ASTM 88H
0.950 to 1.000
0.0005°
09/088/0
ASTM 89H
1.000 to 1.050
0.0005°
09/089/0
ASTM 90H
1.050 to 1.100
0.0005°
09/090/0
330mm Long Hydrometers
adjusted at 60°F for heavier liquids of medium surface tension.