... ,4-20mA output. DH series Voltage and Ampere meter Features: 1) Two isolated Input: AC 0 ... , thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter, Timer, ... are widely used in industrial control and measurement field, such as machinery, electrical cabinet, power sub-station, industrial ...