Clamp current sensor is a high-precision AC current convertor. It adopts a clamp-shaped structure. It can be quickly and easily accessed and used. The compact size is easier to carry and use. Applicable to AC current, leakage current, high harmonic current, phase, electric energy, power, power factor and other tests.It can be used with a variety of measuring instruments, such as: Field calibrator for watt-hour meter, multi-function energy meter, oscillometer, digital multimeter, electrical identification device, cable fault detector, dual-clamp phase volt-ampere meter, digital current recorder, etc., can measure and compare a variety of electrical parameters under constant power. Widely used in substations, power plants, industrial and mining enterprises and testing stations, electrical maintenance departments for current detection and field electrical work, etc.