Magical Exposure Threat Level Measurer

This was a magical device used in the United States of America that measured the threat level of explosure of Magic to the non-magicak people.

It resembled a barometer, had four faces and black hands. Various colours indicated the levels:


 * Green: low level
 * blue: high level
 * yellow: danger
 * red: emergency

There were also counters indicating how many witches and wizard had been burned to death, how many times witches and wizards dad been exposed and how manyy times the Memory Charm had been used on non-magical persons.

A giant measurer, described as majestic, was hung in the foyer of the Magical Congreess of theUnited States of America.

If the wizarding community in America was close to explosure, the device gave an alarm signal, informing the Aurors.

Miniature versions that could be placed on a desk were also produced. Auror Percival Graves owned one of those.

Behind the Scenes

 * The measurer will appear in the first film adaptation of Fantastic Beasts and Wgere to Find Them, and is digitally made.

Appearances

 * Fantastic Beasts and Where to Find Them (film)
 * Pottermore