What is fluxgate current sensor And its working principle?

Working principle of high precision fluxgate current sensor:

Under the action of positive and negative excitation current, the easy-to-saturation magnetic core is used to make the inductance of the magnetic core change with the magnitude of the excitation current, so that the magnetic flux of the magnetic core changes continuously.

The fluxgate current sensor uses the non-linear relationship between the magnetic induction intensity and the magnetic field intensity of the high magnetic permeability core in the measured magnetic field under the saturation excitation of the alternating magnetic field to measure the weak magnetic field. This physical phenomenon seems to be a “gate” to the measured ambient magnetic field. Through this “gate”, the corresponding magnetic flux is modulated and an induced electromotive force is generated. This phenomenon is used to measure the magnetic field generated by the current, so as to indirectly achieve the purpose of measuring the current.

Basic Principles of Fluxgate Sensor Operation

In the magnetic circuit, in order to detect a magnetic field equal to zero magnetic flux, the secondary coil must be excited by the necessary current. In the environment of zero magnetic flux, the current of the sensor is strengthened through the secondary coil, which is confirmed to be proportional to the measured primary current. . Ip=Ns． The Is ferromagnetic core and the auxiliary coil form a saturated inductor. In the case of zero magnetic flux, the detection of the sensor’s magnetic circuit is based on the change in the inductance of the inductor.

Hangzhi Precision – One of the best fluxgate current sensor manufacturers

Hangzhi Precision is one of the best suppliers who manufacture top performance and cost effective fluxgate current sensor. Hangzhi zero fluxgate current transducers and current sensors have high accuracy, linearity & stability, and low temperature drift and zero drift. More details about the Multi point zero flux gate technology is available in the article written by Hangzhi specialists and published on IEEE website.

Few series of AC / DC current transducer products with different accuracy levels and output signal types are developed to meet various applications in different industries.

Top Accuracy & Cost Effective

Fluxgate Precision Current Transducer Products

AIT High Precision Current Transdcuer

AIT series current transducers can measure up to DC1500A with 10ppm accuracy, and analogical current or voltage secondary output options are available.
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IIT Industrial Current Transdcuer

IIT series current transducers can measure up to DC1500A with 0.02% accuracy, and analogical current or voltage secondary output options are available.
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HIT Hall Effect Substituting Current Transdcuer

HIT series current transducers can measure up to DC600A with 0.05% accuracy, and output with analogical current. It is as cost effective as hall effect current sensors, but much higher accuracy, so it is a great replacement for hall effect current sensors
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RIT Leakage Current Transdcuer

RIT series current transducers can measure as low as 10mA, and different range options up to DC10A with 0.5% or 1% accuracy, and output with voltage signal in secondary side.
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DIT High Precision Digital Current Transdcuer

DIT series current transducers can measure up to DC1500A with 0.02% accuracy, and output digital signal via RS485.
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High Current Transdcuer

AIT series high current transducers can measure up to DC12,000A with 50ppm accuracy, and analogical current or voltage secondary output options are available.
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BMS Automotive Current Transdcuer

BMS series automotive current transducers can measure up to DC1500A with 0.5% accuracy, and output digital signal via CAN-BUS, and it also accepts 8-16V power supply and makes it perfect for EV battery system.
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CAFR PCB Current Sensors

CAFR series PCB current transducers can measure up to DC50A with 0.8% accuracy, and output with analogical current. It is with integrated design for PCB installation, also accepts +5V power supply.
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CIT High Precision Split Core Current Transdcuer

CIT series split core current transducers can measure up to DC1500A with 0.05% accuracy, and output with current signal in secondary side. Its split core design makes easy to be installed without breaking the circuit.
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Precision voltage Transducer & Tester Products

HCV High Precision Voltage Transdcuer

HCV series high precision voltage transducers can measure up to DC3,000V or AC2,100V with 0.2% accuracy, and output with ±10V signal.
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HIU High Precision AC/DC Tester

HIU high precision AC/DC tester can measure AC/DC current & voltage up to DC1,000A & DC1000V with 0.02% accuracy. The measured value can be displayed by LCD or transmitted via RS485/232. It is widely used for calibriation of battery charging/discharging testing equipment.
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0.01% Grade High Precision DC Tester

PIU 0.01% grade DC tester can measure DC current & voltage up to DC1,500A & DC1000V with 0.01% accuracy. The measured value can be displayed by LCD or transmitted via RS485/232. It is widely used for calibriation of battery charging/discharging testing equipment.
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PSM Portable AC/DC Standard Tester

PSM series portable AC/DC standard tester can measure up to DC1,500A & DC1,000V with 0.02% accuracy. The measured value can be displayed by LCD or transmitted via RS485/232. It is widely used in electrical calibration and laboratories.
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Our Customers of Zero Fluxgate transducers

Hangzhi AC / DC zero flux gate current transformers have been widely used in electrical equipment, medical equipment, battery testing equipment and calibration equipment etc. Especially, they are well recognized by national R&D institutes, national metrology institutes, and global medical and electrical manufacturers

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