QIUSUO Portable Multi Parameter Water Quality Meter Tester with Calibration Solutions for Measuring pH ORP Ion Concentration Conductivity TDS Salinity Resistivity Dissolved Oxygen Range -2.000 to 20.000 pH Accuracy ±0.002 pH

QIUSUO Multiparameter Water Quality Meter Portable Multi Parameter Water Quality Meter with Conductivity Standard Solutions Range -1999.9 to 1999.9 mV for Measuring pH ORP Ion Concentration Conductivity TDS Aalinity Resistivity Dissolved Oxygen

QIUSUO Multiparameter Water Quality Analyzer Portable Multi Parameter Water Quality Tester with Conductivity Standard Solutions Accuracy ±0.002 pH for Measuring pH,ORP,Ion Concentration,conductivity,TDS,salinity,resistivity And Dissolved Oxygen

QIUSUO Multi Parameter Water Quality Analyzer Portable Multiparameter Water Quality Analyzer with Conductivity Standard Solutions TDS Range 0 to 10.00 100.0 1000 ppm 10.00 200.0 ppt Resistivity Rangen0.00 to 20.00 MΩ USB Communication Interface

QIUSUO Multi-parameter Water Quality Meter Water Quality Monitoring with Conductivity Standard Solutions Range -2.000 to 20.000 pH for Measuring pH ORP Ion Concentration Conductivity TDS Aalinity Resistivity Dissolved Oxygen

QIUSO Multiparameter Water Quality Meter Portable Multi Parameter Water Quality Analyzer with Calibration Fluid Resolution 0.001/0.01/0.1 pH Selectable ORP Range -1999.9 to 1999.9 mV Stores Up 500 Data Sets Auto-Power Off Automatic Electrode Diagnosis

QIUSUO Multi Parameter Water Quality Meter Analyzer with Range -2.000 to 20.000 pH Resolution 0.001 0.01 0.1 pH Selectable Calibration Fluid for Measuring pH ORP Ion Concentration Conductivity TDS Salinity Resistivity Dissolved Oxygen