Used in the food and beverage and other industries for measuring % sucrose by weight, these plain form hydrometers are available in various ranges from -5 to 71 brix. lead free ballast and glass individually serialized temperature standardization of 20°c 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.