Power Meter Measure:RMS,single or 3 phase,total 28 electrical ... protocol. DW series True Value Display (RMS) Power Meter,Energy Meter Features: 1) True effective measure: voltage, current, active power, reactive power ... (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, ...