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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.
Range Subdivision Product No -1 to 11 0.1° 09/001/0 9 to 21 0.1° 09/002/0 19 to 21 0.1° 09/003/0 29 to 41 0.1° 09/004/0 39 to 51 0.1° 09/005/0 49 to 61 0.1° 09/006/0 59 to 71 0.1° 09/007/0 69 to 81 0.1° 09/008/0 79 to 91 0.1° 09/009/0 89 to 101 0.1° 09/010/0
ASTM Hydrometer No
API Scale
ASTM 1H
ASTM 2H
ASTM 3H
ASTM 4H
ASTM 5H
ASTM 6H
ASTM 7H
ASTM 8H
ASTM 9H
ASTM 10H
330mm Long Plain Hydrometers – Specific Gravity Scale
adjusted at 60°F for Petroleum Products and other liquids of low surface tension.
Range Subdivision Product No 0.650 to 0.700 0.0005° 09/082/0 0.700 to 0.750 0.0005° 09/083/0 0.750 to 0.800 0.0005° 09/084/0 0.800 to 0.850 0.0005° 09/085/0 0.850 to 0.900 0.0005° 09/086/0 0.900 to 0.950 0.0005° 09/087/0 0.950 to 1.000 0.0005° 09/088/0 1.000 to 1.050 0.0005° 09/089/0 1.050 to 1.100 0.0005° 09/090/0
ASTM Hydrometer No
°SG
ASTM 82H
ASTM 83H
ASTM 84H
ASTM 85H
ASTM 86H
ASTM 87H
ASTM 88H
ASTM 89H
ASTM 90H
330mm Long Hydrometers
adjusted at 60°F for heavier liquids of medium surface tension.
Range Subdivision Product No 0.950 to 1.000 0.0005° 09/098/0 1.000 to 1.050 0.0005° 09/111/0 1.050 to 1.100 0.0005° 09/112/0 1.100 to 1.150 0.0005° 09/113/0 1.150 to 1.200 0.0005° 09/114/0 1.200 to 1.250 0.0005° 09/115/0 1.250 to 1.300 0.0005° 09/116/0 1.300 to 1.350 0.0005° 09/117/0 1.350 to 1.400 0.0005° 09/118/0 1.400 to 1.450 0.0005° 09/119/0 1.450 to 1.500 0.0005° 09/120/0
ASTM Hydrometer No
°SG
ASTM 98H
ASTM 111H
ASTM 112H
ASTM 113H
ASTM 114H
ASTM 115H
ASTM 116H
ASTM 117H
ASTM 118H
ASTM 119H
ASTM 120H