A Eutech Star Buy! Combining the strengths of all CyberScan 600 series meters, the CyberScan PCD650 is our top-of-the-line waterproof handheld that enables concurrent measurement of pH, conductivity, dissolved oxygen and temperature, all at the same time. Applications Environmental: Test water quality, monitor health of aquatic ecosystems, survey surface and ground water drinking supplies, and meet EPA regulations. Water Quality Testing: For analyzing water hard water, untreated water, drinking water, effluent water, pool water and incoming process water. Ideal for all types of quality assurance and water quality testing. Industrial: For checking metal finishing, cooling tower water, printing fountain solutions, boiler water, brines, rinse tanks, ponds, pollution control, recirculating systems, waste water and industrial process systems. Useful for food analysis and quality assurance testing. Aquaculture: Use to monitor oxygen levels in catfish and shrimp farming; game stocking ponds; ornamental fish tanks and ponds; and other fish farming applications.