Exclusive Academic Offer >



AC Flexible Clamp Sensors in 3 Diameter Sizes

Hioki current sensors are best-in-class devices for use with power meters, PQAs and Memory HiCorders. The CT9667 series are flexible Rogowski type AC sensors comprising of 3 different models in various loop diameter sizes from 100 to 254 mm. The 100mm and 180mm diameter sensor also feature extra thin cables for easier looping around complicated wiring. All 3 sensors 500A/5000A ranges, making them ideal for measuring large load current. CAT IV 600 V, CAT III 1000 V Key Features • Thinner cables are easy to use in confined spaces and with complicated wiring • Shaped so that it’s easy to route through complex wiring • Easily supports large current measurements up to 5000 A • Wide 10 Hz to 20 kHz band with excellent frequency characteristics • Choose from three conductor diameter sizes • Combine with Hioki power meters or Memory HiCorders

Model No. (Order Code)

CT9667-01 φ100 mm (3.94 in)
CT9667-02 φ180 mm (7.09 in)
CT9667-03 φ254 mm (10.00 in)

Note: These current sensors may also be used with HIOKI power quality analyzers, power meters or Memory HiCorders.


Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Rated input current5000 A AC/ 500 A AC
Max. allowable input10000 A continuous (45 to 66 Hz, requires derating at frequency)
Bandwidth10 Hz to 20 kHz (±3dB)
Amplitude and phase accuracy±2 % rdg. ±0.3 % f.s. (45 to 66 Hz, at center of flexible loop)
Phase: ±1 deg (45 to 66 Hz)
Output voltage500 mV AC/f.s. (0.1 mV AC/A) at 5000 A range
500 mV AC/f.s. (1 mV AC/A) at 500 A range
Max. rated voltage to earth1000 V AC (CAT III), 600 V AC (CAT IV)
Core diameterφ 100 mm (3.94 in)φ 180 mm (7.09 in)φ 254 mm (10.00 in)
Output terminalBNC
Operating temperature-25 °C to +65 °C
(-13 °F to 149 °F)
-25 °C to +65 °C
(-13 °F to 149 °F)
-10 °C to +50 °C
(14 °F to 122 °F)
Power supplyLR6 (AA) alkaline batteries ×2, Continuous use : 7 days (rated power 35 mVA), or AC adapter 9445-02/-03 (rated power 0.2 VA), or External power supply 5 to 15 V DC (rated power 0.2 VA)
Dust and water resistanceFlexible loop only: IP54
* Do not use when wet.
Dimensions and massFlexible loop cable diameter: φ7.4 mm (0.29 in),
Cable length: Between flexible loop and battery box: 2 m (6.56 ft),
Output cable: 1 m (3.28 ft), Battery box: 35 mm (1.38 in)W × 120.5 mm (4.74 in)H × 34 mm (1.34 in)D, 280 g (9.9 oz)
Flexible loop cable diameter: φ13 mm (0.51 in), Cable length: Between flexible loop and battery box: 2 m (6.56 ft), Output cable: 1 m (3.28 ft)
Battery box: 35 mm (1.38 in)W × 120.5 mm (4.74 in)H × 34 mm (1.34 in)D, 470 g (16.6 oz)
AccessoriesLR6 (AA) alkaline batteries ×2, Instruction manual ×1

Log into your myHioki account to access more technical documents and information where available.

Seminar Videos On Demand

No results were found.

Seminar Schedule

Automotive Testing Expo - Stuttgart, Germany

Jun 5, 2018 - Jun 7, 2018

Registration Open

iEVTech 2018 Thailand - Bangkok

Jun 6, 2018 - Jun 9, 2018

Registration Open

PSECE 2018, Manila

Jun 13, 2018 - Jun 15, 2018


Catalog: AC FLEXIBLE CURRENT SENSOR CT9667 Download PDF  [1MB] English

User Guides

No results were found.


Instruction Manual English
Instruction Manual Simplified Chinese
Operating Precautions Japanese
Simplified Chinese
Traditional Chinese

Outline Drawings




Drivers, Firmware

No results were found.


No results were found.



AC ADAPTER 9445-02

For USA, 100 to 240 V AC, 9 V/ 1 A

AC ADAPTER 9445-03

For EU, 100 to 240 V AC, 9 V/ 1 A


Receiving end: Female BNC; Output end: Male banana-plug *Not compatible with older generation Memory Hicorders with banana input terminals


No results were found.


No results were found.

  • Search

    Search Results Include Discontinued Products

    Login to myHIOKI


  • Ask


    • email
    • Ask Online
  • Quote

    • Request a Quote
    • Locate a Distributor

Related Products List