Raising the Bar for High-Accuracy Measurement



Model No. (Order Code)

CT68772000 A AC/DC, ME15W terminal, 3 m (9.84 ft) cable length
CT6877-012000 A AC/DC, ME15W terminal, 10 m (32.81 ft) cable length
Guarantee 3 Years


Hioki pull-through AC/DC current sensors are best-in-class devices for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT6877 is a DC to 1 MHz/2000A sensor, ideal for capturing current signals from switching power supplies, inverters, power conditioners, etc.

CAT III 1000 V

Key Features

• Easily measure large 2000A currents to meet applications in EV, HEV testing
• Improved noise resistance performance through a stronger shield lets you accurately measure current buried in noise
• High accuracy measurement realized through flat frequency characteristics and CMRR performance
• More enhanced environmental resistance performance than ever before lets you measure in -40 to 85°C situations
• Improved basic accuracy of ± 0.04% and phase accuracy of ± 0.1°
• Superior frequency characteristics of DC to 1 MHz (amplitude)
• Meet a wide range of applications from measuring battery charge/discharge to the secondary side of inverters in photovoltaic power generation and fuel cell evaluation, etc.
• Monitor waveforms when paired with oscilloscopes or Memory HiCorders and Sensor Unit


Through current sensor for 2000A

Most large currents are divided into two to four wires. In the past, it was necessary to measure wires individually using multiple current sensors due to the devices’ insufficient aperture size and current ratings. The optional Sensor Unit CT9557 provided functionality for adding together the sensors’ measured values in such setups and outputting the result as a single signal. Thanks to its large, 80 mm aperture, the CT6877 can accommodate four wires with an outer diameter of 31 mm (equivalent to a cross-sectional area of 250 mm2). In this way, a single sensor can be used to collectively measure wires carrying up to 2000 A.

Unparalleled technology driving the evolution of current measurement

Current sensor performance is maximized with the “Zero Flux (Fluxgate Detection)” measurement method. High frequency current is detected with windings (CT method), and direct to low frequency current is detected with fluxgates. Use of a newly developed opposed split coil* for the winding (CT) makes possible a broad measurement band, while strengthened shielding boosts anti-noise performance. *Opposed Split Coil: Coil in which divided windings are arranged opposite each other on a magnetic core to broaden the range of current detection

Broad frequency band

The CT6877 has a frequency band of DC to 1 MHz, placing it among the best-performing pass-through sensors rated for 2000 A and making it ideal for measuring currents being switched at high frequencies by SiC/GaN elements.

Guaranteed accuracy when used in combination with a power meter

Since the company develops both current sensors and power meters, Hioki is able to guarantee the combined accuracy of the products when used together for greater customer peace of mind. Used in conjunction with a high-precision power meter such as Hioki’s Power Analyzer PW6001, the CT6877 can measure currents with a high degree of accuracy. ● Example of the CT6877 being used with the Power Analyzer PW6001 From DC to 2 MHz, industry’s proven solution for high-accuracy power analysis. The PW6001 features a phase shift function for current sensors to lock in accurate measurement of high-frequency power. 5 MS/s sampling at 18-bit resolution ensures true power analysis of PWM waveforms and results that are free of aliasing error.

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

Rated current2000 A AC/DC
Max. allowable inputWithin the derating range, (within the specified range up to ±3200 Apeak )
Frequency characteristicsAmplitude: DC to 1 MHz, Phase: DC to 700 kHz
Basic accuracy(DC, 45 Hz ≤ f ≤ 66 Hz) Amplitude: ±0.04 % rdg. ±0.008 % f.s., Phase: ±0.1°
Output voltage rate1 mV / A rated (This device outputs AC+DC voltage via the Sensor Unit. Use with voltage input equipment with high input impedance such as 1 MΩ)
Max. rated voltage to earth1000 V AC/DC (50/60 Hz, CAT III )
Core diameterφ 80 mm (3.15 in)
Operating temperature, humidity-40°C to +85°C (-40°F to 185°F), 80% RH or less (with no condensation)
Power supplyPower suppled via the Power Analyzer PW6001, PW3390, or Sensor Unit CT9555, CT9556, CT9557
Max. rated power9.5 VA max. (at 2000 A/55 Hz, ±12 V power requirement)
Dimensions and mass229 mm (9.02 in)W × 232 mm (9.13 in)H × 112 mm (4.41 in)D, CT6877: 5 kg (176.4 oz), cable length 3 m (9.84 ft), CT6877-01: 5.3 kg (186.9 oz), cable length 10 m (32.81 ft)
AccessoriesInstruction manual ×1, Mark bands ×6, Operating precautions ×1


Catalog: AC/DC CURRENT SENSOR CT6877, CT6876, CT6875

Declaration of Conformity


Technical Notes

AC/DC Current Sensor CT6875/CT6876/CT6877 [4MB]


Connection Options

* L9217: for motor analysis input



Cord has insulated BNC connectors at both ends, 1.6 m (5.25 ft) length

Current sensors for the F/V Unit 8940

*To connect the current sensor via the conversion cable for the F/V Unit 8940, or using with the Power supply unit 9555-10.



0.2 m (0.66 ft) length, to connect the CT6841-6846, CT6863/6865, 9709, 9272-10 to the F/V Unit 8940, Cannot be used in combination with the CT6862

Option A

The CT9901 is for connecting the PW9100 to the 3390



ME15W (12 pin) to PL23 (10 pin) connector

Option B

Only 1 unit of CT9902 can be used at any one time.



5 m (16.41 ft) length, ME15W (12 pin) - ME15W (12 pin) connector

Other options for Input



Cord has insulated BNC connectors at both ends, 1.6 m (5.25 ft) length


Cord has metallic BNC connectors at both ends, use at metallic terminal, 1.5 m (4.92 ft) length


To connect the CT6841-6846, CT6865/63/62, 9709, 9272-10 to the 8971/40/51, 38 cm (14.96 in) length

PL23 (10 pin) - ME15W (12 pin) conversion

*When using a 10-pin sensor without “-05” in the model number, Conversion Cable CT9900 must be used to connect to 12-pin terminal.



Convert PL23 (10-pin) terminal to ME15W (12-pin) terminal

POWER SUPPLY for Current Sensors

*A separate power supply (CT955x) is required in order to use a high-precision current sensor.



• Power supply for current sensors when used alone • 1ch, with Waveform output


• Power supply for current sensors when used alone • 1ch, with Waveform/RMS output


• Power supply for current sensors when used alone • 4ch, with Waveform/Total Waveform/Total RMS output

Up to 4000 A (High precision)

Aggregate and measure large currents in multi-cable circuitsUse multiple AC/DC Current Sensor CT6865-05 or AC/DC Current Probe CT6846-05 units with the Sensor Unit CT9557 to measure currents of up to 4000 A in multi-cable circuits. Requires 1 connection cable to connect the PW6001/PW3390 to the CT9557.



• Power supply for current sensors when used alone • 4ch, with Waveform/Total Waveform/Total RMS output

Measure the Efficiency of Quick Chargers for Electric Vehicles (EVs) 

Evaluation of Input and Output Characteristics of Power Conditioners 

Comprehensive Evaluation of Inverter Motors 

Evaluate the Efficiency of a DC-DC Converter 

AC/DC Current Sensor CT6875/CT6876/CT6877 [4MB]

There are no drivers, firmware or software available for this product.