Consistent, High-precision Current Testing Across a Wide Temperature Range

Hioki AC/DC clamp sensors are best-in-class current sensors for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT6843 is DC to 500 kHz/200 A sensors, ideal for capturing signals during the efficiency testing of batteries, inverters and power conditioners.

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

High-accuracy current sensors ideal for use with oscilloscopes and power meters

Compared to current sensors that use Hall elements, flux gate type current sensors are not prone to measurement error caused by variations in the external temperature. In addition, they can measure extremely low input (current values) and current waveforms with phase that lags by 90° with a high degree of precision. The CT6840 Series AC/DC Current Probes are ideal for measuring power waveforms with a digital oscilloscope and power meters.

Key Features

  • Ideal for use in environmental testing with broad -40˚C to 85˚C temperature range
  • High precision with a clamp-type design, ±0.3% amplitude accuracy, ±0.1° phase accuracy
  • Wide-bandwidth DC to 500 kHz
  • Single-handed operation and robust locking mechanism
  • Reduced effects from magnetic fields, conductor position, and noise from nearby wires
  • For EV/HEV battery charge and discharge efficiency measurement and inverter and power conditioner conversion efficiency evaluation

Model No. (Order Code)

CT6843 Discontinued, 200 A AC/DC, PL23 terminal
CT6843-05 Discontinued, 200 A AC/DC, ME15W terminal
Note: These products 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. Products can be directly connected to the compatible Power Meters and Power Analyzers.

Germany iF Design Award

Ideal for thermostatic chambers and engine compartments

The CT6843 series is ideal for operational evaluations of devices inside equipment that is subject to extreme temperature changes, offering tough, high-precision testing thanks to its broad temperature characteristics and an operating temperature range of -40°C to 85°C. The clamp sensor's tough performance helps ensure you can make the measurements you need.

Measure the charge and discharge efficiency of EV/ HEV batteries

In many situations, it is not possible to use high-accuracy pass-through sensors to evaluate EVs and HEVs since their wiring cannot be easily disconnected. The CT6843’s clamp-type design and resin casing make them more resistant to deformation from heat than that used in legacy products, allowing you to take measurements under the hood with extremely high precision.

Basic specifications

Accuracy guaranteed: 1 year
Rated current 200 A AC/DC
Max. allowable input 400 A rms (requires derating)
Frequency characteristics Amplitude: DC to 500 kHz
Phase: DC to 300 kHz
Amplitude and phase accuracy DC ±0.3 % rdg. ±0.02 % f.s. (Phase: Not defined)
DC< f ≤ 100 Hz ±0.3 % rdg. ±0.01 % f.s. (Phase: ±0.1°) Defined to 500 kHz
Power consumption 6 VA max. (at 200 A/55 Hz, ±12 V power requirement)
Output voltage 0.01 V/A
(This device outputs AC+DC voltage via the Sensor Unit)
Core diameter φ 20 mm (0.79 in)
Operating temperature, humidity -40 °C to +85 °C (-40 °F to 185 °F), 80% rh or less (with no condensation)
Power supply ±11 V to ±15 V DC (Power suppled via the Sensor Unit, which supports 100 to 240 V AC)
Dimensions and mass 153 mm (6.02 in)W × 67 mm (2.64 in)H × 25 mm (0.98 in)D, 370 g (13.1 oz), cord length: 3 m (9.84 ft)
Included accessories Instruction manual ×1, Mark bands ×6, Carrying Case ×1

Compatible models

Compatible models CT6843 (To Be Discontinued) CT6843-05
Power Analyzer
PW6001, PW3390
△ (Requires CT9900) OK
Power Analyzer
OK △ (Requires CT9901)
Power HiTester
3193 series
OK △ (Requires CT9901)
Current Unit
△ (Requires the 9318) △ (Requires the 9318, CT9901)
F/V Unit
△ (Requires the 9318, 9705) △ (Requires the 9318, 9705, CT9901)

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)

For connecting to the F/V Unit 8940 or Current Unit 8971

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