... 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 measure true ... alarm value set freely;4) Some model with 4-20mA analog current output;5) Some model ...