Atlases and World Globes > World Globes for Education > Magnetic Levitating 20cm Blue/Silver by Stellanova

The electromagnetic suspended globe is an impressive high-tech instrument. A magnetic field sensor permanently measures the height at which the globe sphere is suspended. The sensor and the micro computer in the base control an electronic magnet in the upper part of the frame and therefore check the distance between globe shere and magnetic head.
An additional, permanent magnet in the base holds the shere safely on the frame when the suspension mechanism is switched off.