... for any selectable electrical parameters.4) Communication:RS485 /RS232 interface,MODBUS RTU procotol.5) ... distribution,building automation,eg.,single/three phase,voltage/current/power,three phase voltage/ampere integrated display control ... TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer ...