Multidin M80x and M81x are 96x96mm cased three phase power meters.
They measure Volts, Amps, Frequency, Demands, Maximum Demands, Active Power, Reactive Power, Apparent Power, Active Energy, Reactive Energy and Real Power Factor.
The M80x versions use a Liquid Crystal Display and the M81x versions an LED display.

The M812 LED version additionally offers THD measurements on voltages and currents.

The M801 is a lower cost LCD version, measuring Volts, Amps, Frequency, Active Power and Apparent Power.
All feature the option of pulsed output and an RS485 port using a subset of Modicon's Modbus protocol.