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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&#176; to 96&#176;API in accordance with the American Petroleum Institute (API) and the American Society of Testing Materials (ASTM) E100 standards. <ul style="margin-top:0px; padding-top: 5px; padding-bottom: 5px;"><li> Conform to the accuracy requirements of ASTM hydrometers</li><li> Lead free ballast and glass</li><li> Individually serialized </li><li> Temperature standardization: 60&#176;F/60&#176;F</li><li> Hand inspected by our U.S. quality team </li><li> 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.</li></ul>

H-B DURAC 29/41 Degree API ASTM 4H Hydrometer

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