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Amazon.com: Benchtop Conductivity Meter PH Conductivity TDS Salinity Resistivity Temp Multiparameter Meter Kit 0.01 pH 0.5% FS Accuracy : Industrial & Scientific
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PC9500 Benchtop pH/Conductivity Meter Kit, pH Accuracy ±2000mV, pH Range-2.000 to 20.000 | Southern Labware
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