Description
Hioki AC Flexible Current Sensor CT9667 for Confined Installations
The Hioki AC Flexible Current Sensor CT9667 is engineered for professionals who need reliable measurement of large AC currents without the limitations of rigid clamp sensors. Built on Rogowski coil technology, this flexible sensor easily loops around conductors in tight spaces, making it especially useful in switchboards, distribution panels, and industrial power systems with dense wiring layouts.
High-Current Applications
Designed to support both 500 A and 5000 A AC ranges, the CT9667 series enables accurate monitoring of heavy electrical loads while maintaining excellent frequency characteristics. Its ability to handle continuous input currents up to 10000 A at power frequencies makes it suitable for measuring large motors, transformers, and power distribution lines. The sensor delivers stable amplitude and phase accuracy, supporting dependable power and waveform analysis.
Flexible Loop Measurement
The CT9667 series is available in three loop diameters ranging from 100 mm to 254 mm, allowing users to select the ideal size for their specific installation. Models CT9667-01 and CT9667-02 feature extra-thin flexible cables, making them easier to route through complex wiring paths. This design minimizes installation effort while improving safety during live measurements.
Instrument Compatibility
With a standard BNC output terminal, the CT9667 connects directly to Hioki power meters, power quality analyzers, and Memory HiCorders equipped with BNC input terminals. This flexibility allows seamless integration into existing measurement systems without additional adapters. The sensor is powered by AA alkaline batteries, an AC adapter, or an external DC power supply, ensuring dependable operation during extended measurement sessions.
Reliable Field Performance
Built for demanding environments, the CT9667 operates across a wide temperature range and offers IP54 protection on the flexible loop for dust and splash resistance. Its lightweight construction and compact battery box make it easy to transport and deploy during field inspections. While optimized for large current measurement, the CT9667 is not intended for leakage or minute current applications.
Technical Specifications Table
| Specification | CT9667-01 | CT9667-02 | CT9667-03 |
| Measurement Type | AC current | AC current | AC current |
| Rated Current | 500 A / 5000 A | 500 A / 5000 A | 500 A / 5000 A |
| Max Allowable Input | 10000 A continuous | 10000 A continuous | 10000 A continuous |
| Frequency Range | 10 Hz to 20 kHz | 10 Hz to 20 kHz | 10 Hz to 20 kHz |
| Loop Diameter | φ100 mm | φ180 mm | φ254 mm |
| Output Voltage | 500 mV AC full scale | 500 mV AC full scale | 500 mV AC full scale |
| Output Terminal | BNC | BNC | BNC |
| Safety Rating | CAT IV 600 V, CAT III 1000 V | CAT IV 600 V, CAT III 1000 V | CAT IV 600 V, CAT III 1000 V |
| Operating Temperature | -25°C to 65°C | -25°C to 65°C | -10°C to 50°C |
| Power Supply | AA batteries, AC adapter, or DC input | AA batteries, AC adapter, or DC input | AA batteries, AC adapter, or DC input |
| Application Focus | Large load current measurement | Large load current measurement | Large load current measurement |
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