Thermco's Precision Hydrometers are manufactured to exacting standards for accuracy, uniformity, and dependability. Thermco's offering of hydrometer include glass & plastic hydrometers in the following scales... specific gravity baume and density Hydrometers, ATSM & API Hydrometers, Alcohol Hydrometers, Brine Brix Hydrometers and Combined Form. Thermo-Hydrometers. Thermco's Hydrometers are commonly found in the Petroleum industry, Wine, Brewing & Distilleries industries and Chemistry / Pharmacology industries. Each hydrometer is individually serialized and provided with a Hydrometer certificate of compliance and traceability. Hydrometers are suitable for calibration resulting in a DAkks or ISO 17025.