... electronic coulometer,can measure voltage , current ,active power, reactive power ,apparent power ,PF,Kwh,Hz EU9 Series digital Kwh meter ... can measure voltage , current ,active power, reactive power ,apparent power ,PF,Kwh,Watt, Hz1) Power supply: AC/DC 100-240V2) Available ... impedance: ≤0.02Ω12) Dielectric strength:AC1500V/1min13) Communication: RS485, Modbus RTU14) Sampling rate: 2 times/s15) ...