Brady Instrument manufactures and sells High Quality, Custom, USA Made Instruments: Hydrometers, Thermometers, Battery Testers, Homebrew, Beer Wine, Salinometers, Brix, Baume, Brine, Proof Tralle, Maple Syrup, Sap, Diesel, Alcohol, Moonshine, Sugar, ASTM, Military, Certified, NIST, Salt, Aquarium, Aviation, Antifreeze, Ethylene Glycol and More! Check us out at www.BradyInstruments.com