... Single Phase Kwh Meter 1)Multi-function voltage meter 2)Measure voltage, current, power factor, KWH, etc 3) 2 alarm, RS485 single phase Kwh meter / voltage ... meter / ampere meter DW8 series ampere meter, power meter, voltage meter 1) To ... true effective value (for AC signal); 2) To measure voltage, current, power factor, active power, reactive power, ...