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Product selling points 6-in-1 Accurate Water Quality Testing detectable pH(0.1 - 14.0pH ),EC(0 - 1999μS/cm;2000 - 10000μS/cm ),TDS(0 - 999ppm;1000 - 9999ppm ),ORP(- 999~+ 999mV ),CL( Residual chlorine ...