Ideal for Measuring AC Current with Low Frequencies such as Inverter Control Devices

Hioki current sensors are best-in-class devices for use with power meters, Memory HiCorders and high performance oscilloscopes. The 9272-10/9272-05 are a 1 Hz to 100 kHz AC current sensor ideal for measuring low frequency equipment such as inverters.


Use with an instrument with a high input impedance of 1 MΩ or higher.

Key Features

  • Superior low frequency and phase characteristics suitable for testing the current and power of inverter control devices
  • Wide 1 Hz to 100 kHz frequency bandwidth perfect for harmonic analysis, FFT analysis and waveform monitoring (AC only)
Note: This product cannot be used alone. The optional Sensor Unit is required in order to supply power and connect the clamp to a Memory HiCorder or other instrument. The clamp can be directly connected to a compatible Power Meter, or Power Analyzers.

Basic specifications

Accuracy guaranteed: 1 year
Rated current 20 A AC, or 200 A AC (selectable)
Max. allowable input 50 A rms (at 20 A range), 300 A rms (at 200 A range)
Frequency characteristics 1 Hz (±2 % rdg. ±0.1 % f.s.) to 100 kHz (±30 % rdg. ±0.1 % f.s.)
Amplitude and Phase accuracy Amplitude: ±0.3 % rdg. ±0.01 % f.s. Phase: ±0.2 ° (45 to 66 Hz)
Output voltage 2 V/20 A or 2 V/200 A
(This device outputs AC voltage via the Sensor Unit)
Max. rated voltage to earth 600 V rms (CAT III)
Core diameter φ 46 mm (1.81 in)
Power supply Power suppled via the Power Analyzer PW8001, PW6001, PW3390, Sensor Unit CT9555, CT9556, CT9557, or 3CH CURRENT UNIT U8977
Power consumption 5 VA Max. (when measuring 200 A)
Dimensions and mass 78 mm (3.07 in) W × 188 mm (7.40 in) H × 35 mm (1.38 in) D, 430 g (15.2 oz), cord length: 3 m (9.84 ft)
Included accessories Carrying case 9355 ×1, Instruction manual ×1, Mark bands ×6

Compatible models

Compatible models 9272-10 (Discontinued product) 9272-05
Power Analyzer PW3390 △ (Requires CT9900) OK
Power Analyzer 3390 OK △ (Requires CT9901)
Power HiTester 3193 series OK △ (Requires CT9901)
Current Unit 8971 △ (Requires the 9318) △ (Requires the 9318, CT9901)
F/V Unit 8940 △ (Requires the 9318, 9705) △ (Requires the 9318, 9705, CT9901)
3CH Current Unit U8977 △ (Requires the CT9900) OK

Bundled accessories (1)

Options A (5)

Options B (1)

Cannot be used in combination with the 9277, 9278, 9279

Options C (2)

The CT9902 connects up to 2 cables in series (Accuracy addition required)

Options D (1)

*The Clamp Sensor 9272-10 has different output wiring than the previous 9272. Both the 9318 and 9705 are required in order to connect to the F/V Unit 8940.

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