CEM18.01-500V-50/60HZ is an ETI Polam power meter that uses digital displays for monitoring and recording. It has a voltage range of 500V, a frequency of 50/60HZ, and a number of inputs and outputs to monitor single phase, three phase and delta-connected systems. It measures such parameters as kW, kVA, PF, kWh, cumulative cost, peek demand, current, voltage, auto power quality and harmonics. It also has pulse output and RS485 Modbus protocol output, allowing integration with other control systems.