| Item Description | Multifunctional smart meter / smart meter - ESA-22121-R - smart electricity series, using advanced metering chips and high-precision sensors to achieve dynamic sensing of up to 40 variables, used for monitoring low-voltage three-phase circuit electricity parameters; Single phase and three-phase power monitoring, including active, reactive, and apparent power, monitoring voltage, current, power, power factor, and energy consumption; Oled screen display supports local queries, alarms, settings, etc; Support remote management, RS485, MODBUS communication; Support 2-CHANNEL digital input status detection and 1-CHANNEL relay output linkage control; The default measurement accuracy is 0.5 level, and it CAN be customized to 0.2 level |