Hioki CT9556 Sensor Unit

Hioki-Sensor Unit

Hioki CT9556 Sensor Unit Power supply for high-precision current sensors

Hioki pass-through current sensors and clamp on current probes are best-in-class current sensing devices for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT9556 is 1-channel sensor unit and power adapter for any of the CT686x series, 9709 and CT684x series current sensors and probes that provides waveform and RMS output.

Using with a data logger to perform high-precision current measurement

In this setup, waveform output is monitored on the DC current side, and RMS output is monitored on the AC current side of the circuit. Even a logger that lacks RMS conversion functionality can be used to measure AC current. A wireless logger can also be used. If a high-precision voltmeter is used, both the AC and DC currents can be measured with a high degree of precision.


  • Power supply for high-precision
  • Current sensors with waveform
  • Output / RMS output functionality