SQI provide calibration service on electromagnetism covering AC/DC power meter, DC potentiometer, wheat stone bridge, LCR, megger, earth continuity tester, DC resistance box, digital leakage current tester, digital multi meter, digital power meter, instrument transformer, clamp meter, energy meter, hi-pot tester, insulation resistance tester, high voltage electrostatic voltmeter, AC/DC electronic load, power supply, multiple calibrator, kinds of EMC equipment, power quality analyzer, IP equipment, material combustion instrument and etc.