Portable microhm meter

The invention provides a portable microhm meter, and the microhm meter comprises a microprocessor, a sensor signal amplification circuit, double Hall sensors, a current coil, a super-capacitor, a charging circuit, a charging control switch, a rechargeable battery, a divided voltage detection circuit, a voltage amplification circuit, a display, a testing discharge switch circuit, a current obtaining switch circuit, a voltage obtaining switch circuit, and an interface circuit. The interface circuit is provided with four wiring ends: a first pin, a second pin, a third pin, and a fourth pin. The microprocessor is used for coordinating the detection control of all circuits. The microhm meter is portable, is higher in detection precision, and is better in market application prospect.