Fluxgate sensors are devices used to measure magnetic fields. They operate by detecting changes in magnetic flux using a core material, typically made of ferromagnetic material, which enhances sensitivity. When an alternating current passes through the sensor, it creates a magnetic field that can be measured, allowing for precise detection of magnetic field strength and direction. These sensors are commonly used in various applications, including geophysical surveys, space exploration, and navigation systems. Their ability to detect weak magnetic fields makes them valuable in research and industrial settings, where accurate magnetic measurements are essential for understanding environmental conditions or guiding equipment.