... 0~50mS/cm, more measurement parameters, ability to switch among conductivity, TDS, salinity and resistivity. multinomial calculation for TDS and ... accessories: CategoryDescriptionSpecificationconductivity electrodeSX655 plastic conductivity electrodeMeasure regular conductivity, match SX650 pen tester.Conductivity calibration solution 84 μS/cm conductivity calibration solution500mL/250mL/50mL/10mL ...