Hangzhi is one of the high precision current transducer manufacturers located in ShenZhen, China, innovatively developed and designed high precision AC/DC current transducers & standard testers with the combination of technologies including multi point zero-flux, flux excitation close-loop control, self-excited fluxgate technology and multi-close loop control. The current transducers can detect both DC flux, AC flux, and high-frequency ripple with a built-in high-frequency ripple sensing channel, which allow the transducers have both high gains and accuracy at the full bandwidth.