Fluxgate current sensors and Hall current sensors are common current measurement sensors that measure current signals through different principles. The accuracy of fluxgate current sensors is generally higher than that of Hall current sensors for the following reasons:
1. Different principles
The fluxgate current sensor uses Ampere's law and the reeling magnetic effect to measure current. Its principle is to indirectly infer the size of the current by detecting changes in magnetic field intensity around the conductor. The Hall current sensor uses the Hall effect to measure current signals. Its principle is to apply a magnetic field to cause a transverse potential difference in the conductor, thereby achieving current measurement. Since the fluxgate current sensor measures current by measuring changes in magnetic field strength without direct contact with the conductor, it can reduce measurement errors caused by factors such as contact resistance and temperature changes, thereby improving measurement accuracy.
2. Wider measurement range
The fluxgate current sensor has a relatively wider measurement range and can cover a wide range of current measurements from microamps to thousands of amperes. This is because the fluxgate current sensor adopts an iron core design, which can increase the magnetic induction intensity and improve the sensitivity of the sensor. The Hall current sensor is limited by materials, and its measurement range is relatively narrow. Generally, it can only measure below a few hundred amps.
