Nova-Tech offers quality hydrometers and thermo-hydrometers which are serialized for traceability to NIST standards if required. These hydrometers and thermo-hydrometers are manufactured to exacting standards. Each hydrometer is individually tested and inspected to insure the highest level of dependability, accuracy, and uniformity. The following hydrometer scales are available: ASTM specification hydrometers, API hydrometers, Alcohol hydrometers, IRS Internal Revenue Specification hydrometers, Tralle hydrometers, Proof hydrometers, Balling hydrometers, Baume hydrometers, Brix hydrometers, Calcium Chloride hydrometers, Sodium Chloride hydrometers, Soil Analysis hydrometers and Specific Gravity Hydrometers