A fluxgate sensor is a type of magnetic sensor used to measure the strength and direction of magnetic fields. It operates by detecting changes in magnetic flux using a core material that becomes magnetized when exposed to a magnetic field. This sensor is commonly used in applications such as geomagnetic surveys, navigation systems, and space exploration. These sensors are known for their high sensitivity and accuracy, making them ideal for detecting weak magnetic fields. They can be found in various devices, including compasses, magnetometers, and satellites, where precise magnetic measurements are essential for functionality and data collection.