... thousands of different models of products, including Temperature Controller, Digital Adjustor, thermocouple (TC and RTD), Panel Meter, Sensor Meter ... , inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter, Timer, Timer ... 13217608016(Barbara Guo) 86-13435730867(Peter Liao). DH series Digital Voltage and Ampere meter