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Thomas®

DURAC API ASTM Hydrometers; Traceable to NIST

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These plain form hydrometers are available in a variety of models measuring the relative densities (specific gravity) of oil and petroleum products in various ranges from -1° to 101°API in accordance with the American Petroleum Institute (API) and the American Society of Testing Materials (ASTM) E100 standards.  

  • Conform to the accuracy requirements of ASTM hydrometers
  • Lead free ballast and glass
  • Individually serialized
  • Temperature standardization: 60°F/60°F
  • Hand inspected by our U.S. quality team
  • Packaged with a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy indicating accuracy traceable to NIST

Note: Hydrometers should be stored in a clean, dry, safe place, and should not be subjected to extreme temperatures.

Thomas No.ASTM No.RangeLength (mm)DivisionsAccuracy
6025D071H-1 to 11°330mm (13")0.1°±0.1°
6025D11H9 to 21°330mm (13")0.1°±0.1°
6025D153H19/31°330mm (13")0.1°±0.1°
6025D194H29/41°330mm (13")0.1°±0.1°
6025D235H39/51°330mm (13")0.1°±0.1°
6023D276H49/61°330mm (13")0.1°±0.1°
6025D317H59/71°330mm (13")0.1°±0.1°
6025D338H69/81°330mm (13")0.1°±0.1°
6025D379H79/91°330mm (13")0.1°±0.1°
6025D4110H89/101°330mm (13")0.1°±0.1°
6025D4521H0/6°163mm (6.4")0.1°±0.2°
6025D4922H5/11°163mm (6.4")0.1°±0.2°
6025D5323H10/16°163mm (6.4")0.1°±0.2°
6025D57224H15/21°163mm (6.4")0.1°±0.2°
6025D6125H20/26°163mm (6.4")0.1°±0.2°
6025D6526H25/31°163mm (6.4")0.1°±0.2°
6025D6927H30/36°163mm (6.4")0.1°±0.2°
6025D7328H35/41°163mm (6.4")0.1°±0.2°
6025D7729H40/46°163mm (6.4")0.1°±0.2°
6025D8130H45/51°163mm (6.4")0.1°±0.2°
6025D8531H50/56°163mm (6.4")0.1°±0.2°
6025D8932H55/61°163mm (6.4")0.1°±0.2°
6025D9133H60/66°163mm (6.4")0.1°±0.2°
6025D9534H65/71°163mm (6.4")0.1°±0.2°
6025D9935H70/76°163mm (6.4")0.1°±0.2°
6025E0336H75/81°163mm (6.4")0.1°±0.2°
6025E0737H80/86°163mm (6.4")0.1°±0.2°
6025E1138H85/91°163mm (6.4")0.1°±0.2°
6025E1539H90/96°163mm (6.4")0.1°±0.2°

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6025D07
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DURAC -1/11 Degree API ASTM 1H Hydrometer
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6025D11
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DURAC 19/31 Degree API ASTM 3H Hydrometer
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6025D23
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DURAC 59/71 Degree API ASTM 7H Hydrometer
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6025D33
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6025D37
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DURAC 79/91 Degree API ASTM 9H Hydrometer
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