API Hydrometers

The API scale was selected in 1921 by the American Petroleum Institute (API), the U.S. Bureau of Mines, and the National Institute of Standards and Technology (NIST) as the standard hydrometer scale for petroleum products. On select API Hydrometer Hydrometers with a built-in thermometer, the thermometer scale is located in the body of the hydrometer. A correction scale for conversion of the reading to 60°F is printed opposite the temperature scale. Our API ASTM Specification Hydrometers are manufactured in strict accordance to specifications of ASTM (American Society for Testing and Materials) for accuracy and design.

42 Products

B61898-0000
SP Bel-Art, H-B DURAC Individually Calibrated 19/31 Degree API ASTM 3H Hydrometer
$432.57 $508.90

New

B61898-0100
SP Bel-Art, H-B DURAC Individually Calibrated 29/41 Degree API ASTM 4H Hydrometer
$432.57 $508.90

New

B61898-0200
SP Bel-Art, H-B DURAC Individually Calibrated 49/61 Degree API ASTM 6H Hydrometer
$432.57 $508.90

New

B61898-0300
SP Bel-Art, H-B DURAC Individually Calibrated 59/71 Degree API ASTM 7H Hydrometer
$432.57 $508.90

New

B61898-0400
SP Bel-Art, H-B DURAC Individually Calibrated 69/81 Degree API ASTM 8H Hydrometer
$432.57 $508.90

New

B61898-2000
SP Bel-Art, H-B DURAC Individually Calibrated -1/11 Degree API ASTM 1H Hydrometer
$326.61 $384.25

New

B61898-2100
SP Bel-Art, H-B DURAC Individually Calibrated 9/21 Degree API ASTM 2H Hydrometer
$428.23 $503.80

New

B61898-2200
SP Bel-Art, H-B DURAC Individually Calibrated 39/51 Degree API ASTM 5H Hydrometer
$432.57 $508.90

New

B61823-0000
SP Bel-Art, H-B DURAC Safety -1/11 Degree API Combined Form Thermo-Hydrometer
$68.72 $80.85

New

B61823-0100
SP Bel-Art, H-B DURAC Safety 9/21 Degree API Combined Form Thermo-Hydrometer
$81.86 $96.30

New

B61823-0200
SP Bel-Art, H-B DURAC Safety 19/31 Degree API Combined Form Thermo-Hydrometer
$82.54 $97.10

New

B61823-0300
SP Bel-Art, H-B DURAC Safety 29/41 Degree API Combined Form Thermo-Hydrometer
$82.54 $97.10

New

B61823-0400
SP Bel-Art, H-B DURAC Safety 39/51 Degree API Combined Form Thermo-Hydrometer
$80.03 $94.15

New

B61823-0500
SP Bel-Art, H-B DURAC Safety 49/61 Degree API Combined Form Thermo-Hydrometer
$81.86 $96.30

New

B61823-0600
SP Bel-Art, H-B DURAC Safety 59/71 Degree API Combined Form Thermo-Hydrometer
$81.86 $96.30

New

B61823-0700
SP Bel-Art, H-B DURAC Safety 69/81 Degree API Combined Form Thermo-Hydrometer
$68.26 $80.30

New

B61823-0800
SP Bel-Art, H-B DURAC Safety 79/91 Degree API Combined Form Thermo-Hydrometer
$81.86 $96.30

New

B61823-0900
SP Bel-Art, H-B DURAC Safety 89/101 Degree API Combined Form Thermo-Hydrometer
$81.86 $96.30

New

B61893-0300
SP Bel-Art, H-B DURAC 19/31 Degree API ASTM 3H Hydrometer
$48.58 $57.15

New

B61893-0400
SP Bel-Art, H-B DURAC 29/41 Degree API ASTM 4H Hydrometer
$48.58 $57.15

New

B61893-0500
SP Bel-Art, H-B DURAC 39/51 Degree API ASTM 5H Hydrometer
$48.58 $57.15

New

B61893-0600
SP Bel-Art, H-B DURAC 49/61 Degree API ASTM 6H Hydrometer
$48.58 $57.15

New

B61893-0700
SP Bel-Art, H-B DURAC 59/71 Degree API ASTM 7H Hydrometer
$49.90 $58.70

New

B61893-0800
SP Bel-Art, H-B DURAC 69/81 Degree API ASTM 8H Hydrometer
$48.58 $57.15

New

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Select up to 4 items to compare.