Hanna Instruments are used around the world in Agriculture, Aquaculture & Aquariums, Beer Analysis, Boilers & Cooling Towers, Education, Environmental, Food and Dairy, Hydroponics, Industrial, Laboratory, Plating, Pool & Spas, Printing & Graphics, Water Conditioning, Water Treatment and Wine Analysis. Hanna Instrument Product Categories include: Chemical Test Kits, pH Meters, pH/ORP Meters, Ion Selective, Conductivity/TDS, Digital Refractometers, Dissolved Oxygen, Multiparameter, Fertigation Systems, Titration Systems, Chemical Oxygen Demand (COD), Photometers, Turbidity, Temperature, Relative Humidity (RH), Magnetic Stirrers, Mini Panel Controllers, Process Instrumentation, Dosing Pumps, Lux Meters, Reagents, Solutions, Hanna Sanitation Systems and Accessories.