... / A etc.selectable, 3 alarms,4-20mA output. DH series Voltage and Ampere meter Features: 1) Two isolated Input: AC 0-600V ... models of products, including Temperature Controller, Digital Adjustor, thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage ... Phone: 086-13217608016(Barbara Guo) 86-13435730867(Peter Liao). DH series Digital Voltage and Ampere meter