helimagnet

例句：

1. 1.The magnetometer detected a strong magnetic field near the Earth's surface.
   磁力计探测到了地球表面附近的强烈磁场。
2. 2.The magnetometer was used to measure the strength of the Earth's magnetic field.
   磁力计被用来测量地球磁场的强度。
3. 3.The magnetometer is crucial for navigation and communication in spacecraft.
   磁力计在宇宙飞船的导航和通信中至关重要。