IoT Power Meter A IoT power meter is a data-transmitting meter that helps industries monitor and manage three-phase power consumption. It transmits real-time energy consumption data to a server in the cloud, allowing for better management of energy consumption and industrial equipment. Acrel ADW300 energy meter is mainly used to measure three-phase active electric energy of low-voltage network, with RS485 communication and 470MHz wireless communication function, which is convenient for users to monitor, collect and manage electricity consumption.