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February 2018



Correlating Loggers

Subsurface Leak Detection

Thousands of ZCorr Correlating Logger systems have been used all over the US, Canada, Europe, and Asia for many years, and now new ZCorr systems are available. Put 8 ZCorr Correlating Loggers out in the afternoon and survey for water leak sounds at valves for hours late at night. Water main leak clearly apparent? Pinpoint it with just 2 or 3 ZCorr Correlating Loggers on valves, hydrants, or meters nearby. SubSurface Leak Detection, PO Box 5490, Incline Village, NV 89450; (775) 298-2701;



Laboratory Charge Analyzer


Find the best coagulant ppm in minutes! The Chemtrac Laboratory Charge Analyzer determines coagulant dosages for optimum turbidity and/ or total organic carbon reduction in five minutes. Using the same charge measurement principle as the company’s streaming current detectors, the coagulant titration process is much quicker than conventional jar testing. The Laboratory Charge Analyzer is simple to operate, with options for pH measurement and automatic titration. See a demonstration at For more information, contact Chemtrac at (800) 442- 8722 or online at