How does a magna stick work?

• A. It uses a float to measure fuel height in a sensor.
• B. When unlocked from the stowed position, it will align itself with the magnet to give a reading.
• C. It reads readings by a digital display outside the tank.
• D. It relies on fuel temperature to indicate level.

Answer: (B)

Magnetically coupled indication is the key. A Magna-stick uses a float inside the tank that carries a magnet. As fuel level changes, the float moves up or down with the liquid. When you unlock the stick from its stowed position, the magnet in the float aligns with an external magnetized indicator, and that magnetic interaction drives the reader to show the corresponding level on a scale. There’s no separate electronic sensor or temperature-based measurement involved—the reading is produced purely by this magnetic coupling between the internal float and the external indicator.