SENSOR UNIT CT9557

Aggregate and measure large currents in multi-cable circuits

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 CT9557 is 4-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.

Key Features

  • Power supply for high-precision current sensors with waveform output functionality
  • Output a single waveform from an aggregate of input waveforms

Model No. (Order Code)

CT9557 For the CT6841-05, etc., ME15W connector

Measure large currents and multi-cable circuits with aggregate functionality

Once a current sensor has been attached to each branch cable, the CT9557 adds the sensor signals together to create a total signal. Since the sensor unit can treat multiple sensors as a single sensor, the current can be measured using a single power meter.

Basic specifications

Accuracy guaranteed: 1 year, Accuracy guarantee period after adjustment made by Hioki: 1 year
Connectable current sensors Current sensors with a Hioki ME15W (male) output connector (CT686x-05, 9709-05, CT684x-05, etc.)
*The separately available Conversion Cable CT9900 is required in order to use a current sensor equipped with a PL23 (10-pin) terminal
Output Terminal BNC Terminal
Output voltage Waveform output/ Total waveform output: 2 V f.s.
Total RMS output: 2 V DC f.s.
Output resistance 50 Ω
Operating temperature range -10 °C to 50 °C (14 °F to 122 °F)
Power supply AC Adapter Z1002 (100 to 240 V AC, 50/60 Hz, maximum rated power when used with sensors: 155 VA)
External power supply (10 to 30 V DC; maximum rated power: 60 VA)
Dimensions and mass 116 mm (4.57 in)W × 67 mm (2.64 in)H × 132 mm (5.20 in)D (excluding protruding parts),420 g (14.8 oz)
Accessories AC Adapter Z1002 ×1, Power cord ×1, Instruction manual ×1

Options (5)


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