... temperature compensation for best accuracy under fluctuating temperaturesAdjustable temperature coefficient, TDS factor, cell constantModelDDS-11AWDDS-307WDDS-12DW Conductivity Range0~1.999 ... , 19.99, 199.9, 1999uS/cm, 19.99, 199.9mS/cm Conductivity Accuracy ±1.5% F.S ±1% F ... (W)mm×65(H)mm Weight1.7kg DDS-12DW CONDUCTIVITY METER