... 11AW, 307W and 12DW meters for the measurement of conductivity in liquids The DDS-W Series includes models ... 11AW, 307W and 12DW meters for the measurement of conductivity ... temperature coefficient, TDS factor, cell constantModelDDS-11AWDDS-307WDDS-12DW Conductivity Range0~1.999, 19.99, 199.9, ... ×65(H)mm Weight1.7kg DDS-12DW CONDUCTIVITY METER