Hanna manufactures the widest range of water treatment products and equipment in the industry. Our product offering includes handheld and in-line process control instrumentation, chemical metering pumps, colorimeters, test kits, reagents and accessories. Our monitoring and control parameters include conductivity, total dissolved solids, resistivity, pH, ORP, dissolved oxygen, temperature, and a variety of specific ions. Applications include reverse osmosis, high purity water, wastewater, boilers & cooling towers, printing, metal finishing and pool & spas. Hanna has been manufacturing quality products and equipment since 1978.