Multi-Function Process Calibrator With the functions of measurement and ouput, can be used to measure and calibrate voltage, current, resistance, themocaouple, frequency and pt-resistance, etc. Earth Resistance Tester For simple, convenient, fast and correct measurement. Digital Power Clamp Meter Portable 3-phase digital power clamp meter with RS232 interface. Digital Multimeter Kinds of precise, stable, safe and flexible MASTECH digital multimeters can be selected for users different needs. AC/DC Digital Clamp Meter True RMS measurement for AC/DC from 2mA to 2000A. Instrument for Environmental Protection Single circuit economical digital humidity temperature meter, digital anemometer, sound level meter, infrared thermometer and ultrasonic distance estimator. Digital Insulation Tester High-performance insulation tester with digital and analog double displays. Other Instrument RCL, Lux, Photo tachometer, Multi-Function Counter and Engine Analyzer Instrument, etc. Network Tester Line tracker, network cable tester and fiber tester. Analog Multimeter Novel, credible and safe analog multimeter. DC Power Supply Kinds of high-accuracy and high-stabilized single and double power supply. Accessories Numerous accessories can be chosen for all kinds of measurements and functions of the meter.