Rogowski coil designed for accurate non-intrusive measurement of AC/ pulsed DC or complex waveforms This type of transducer may be used to measure all AC current from low frequencies to 5 kHz. RC-V400-100 shielded coil have been designed for accurate non-intrusive measurement of AC, pulsed DC or complex waveforms This type of transducer may be used to measure all AC current from low frequencies to 5 kHz.