... .Measuring 28 items Coulometer 2.CE&ISO certification Kwh Meter 3.4-20mA analog coulometer 3 Phase Multi-function ... Metr & Voltage Meter& Ampere Meter & Kwh Meter Toky DW9 series 3 phase multi-function power ... meter with following features:1) To measure: voltage, current, active power, reactive power, power factor, frequency, Kwh, 4 quadrant energy, ...