Electrical measurement: It can be divided into electrical measurement and magnetic measurement; according to the working frequency, it can be divided into two parts: direct current measurement and alternating current measurement. Electrical measurements include AC and DC voltage, AC and DC current, electrical energy, resistance, capacitance, inductance, and electrical power. Magnetic metrology includes the measurement of magnetic quantities such as magnetic flux, magnetic moment, and magnetic induction. At present, our company has developed multi-function standard source, high insulation resistance measuring instrument, digital multimeter, clamp ammeter, ammeter, voltmeter, power meter, multimeter, resistance box, DC bridge, withstand voltage tester, megger, insulation Resistance tester, grounding resistance meter, electrostatic wristband/footplate tester, surface resistance tester, leakage current tester, DC low resistance meter, magnetic particle flaw detector, spark tester, etc.