Fluxgate magnetic sensors are used in a variety of fields due to their high sensitivity and resolution. Here are some specific areas where they are applied:

1. Geophysics Observation: They are used in geophysical surveys to measure the Earth's magnetic field. Unmanned aerial vehicles (UAVs) are increasingly being used as a new platform for such detections, in addition to traditional methods like helicopter aeromagnetic surveys or ground magnetic surveys.

2. Wearable Electronic Devices: Fluxgate sensors are used in the development of wearable intelligent devices. The pad-printing technique is being explored to fabricate fluxgate sensors for these devices, which offers advantages such as flexibility and potentially lower production costs.

3.Non-Destructive Testing (NDT): Fluxgate sensors are used in non-destructive testing methods to detect defects in materials. They can be used to probe defects of arbitrary orientations in coiled tubing, for example, offering a method that can effectively detect defects in any direction and distinguish between different types of defects.

4. Magnetocardiography (MCG): Fluxgate magnetometers can be used in MCG measurements, which can be performed under room temperature and without shielding and averaging, benefiting from the low noise and offset drift of these sensors.

5. Magnetic Mapping: Fluxgate sensors are mounted on UAVs for magnetic mapping, which can fill the gap between traditional ground and airborne magnetic surveying, providing continuous measurement of the magnetic field at different heights.

These applications showcase the versatility and importance of fluxgate magnetic sensors in modern technology and science.