Power Meter Design service Input:true value three phase measure(bandwidth ... 0.2%, 3-phase voltage and ampere input isolation, high anti-interference;5) Comunication: RS232/RS485 interface, MODBUS RTU procotol. ... ,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid ...