Specific gravity hydrometers are commonly used in industries such as food and beverage, chemistry, pharmacology, transportation, refrigeration and more. Available in a variety of models measuring specific gravity / relative density (g/cm) of liquids lighter and heavier than water in various ranges from 0.690 to 3.000, they are made of lead free ballast and glass. These plain form hydrometers are individually serialized and have a temperature standardization of 60 degrees F (15 degrees C). DURAC Hydrometers are hand inspected by our U.S. quality team in our exclusive triple accredited/registered ISO/IEC 17025:2005 and A2LA Accredited Calibration Laboratory; internationally recognized and accepted by the signatory economies of the ILAC/MRA and located in our ISO 14001:2004 Environmental Management System registered facility. They are packaged with a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy indicating accuracy traceable to NIST. Note: Plain form hydrometers should be stored in a clean, dry, safe place. They should not be subjected to extreme temperatures. Research, industrial and healthcare professionals rely on SP Scienceware for their sample handling needs. Sold worldwide, Bel-Art and H-B Instrument brand laboratory supplies include over 5,000 items from safety wash bottles to fume hoods, thermometers, racks, desiccators, hydrometers, ice buckets, scoops and spoons. Custom calibration services, plastic molding, specialty coatings and wire manufacturing are also available. Wilmad-LabGlass brand laboratory glassware complements Bel-Art and H-B Instrument with over 7000 items including NMR and EPR consumables and specialty glassware, as well as custom fabrication for individual glassware, glass repair services and OEM glass parts