Professional laboratory pH meter contains the mV and relative mV measurement modes, stores up to 1000 data sets, setup menu contains 17 options, accuracy: 0.002 pH.
Professional laboratory pH/ion meter contains 5 ion concentration measurement methods and water hardness measurement mode, 1 to 5 points calibration, accuracy: 0.002 pH.
Precision benchtop pH/ion meter, 1 to 5 points calibration, selectable concentration units. The meter is suitable for measuring the pH, ORP and ion concentration.
Multiparameter benchtop pH meter contains 15 options, the meter is suitable for measuring the pH, ORP, ion concentration, conductivity, total dissolved solids (TDS), salinity, resistivity, DO.