What is the functioning principle of magnetometers?

[swirlyink]

Hey everyone!

I'm participating in a sort of beginning class for building rockets and drones. As part of this, I'm to research information about a component of our sensors, specifically, a magnetometer. We're using the LSM9DS1 stick. I'm having a hard time finding any information about how magnetometers work beyond "Magnets and Earth man!" and I was wondering if anyone had deeper insight?

Thanks in advance!

 

[anorlunda]

Read this first. Maybe some of the references at the bottom.
https://en.m.wikipedia.org/wiki/Magnetometer#Types_of_magnetometerThen come back here with questions.

 

[jedishrfu]

Here's the coil version

https://www.engineersgarage.com/articles/magnetometer

Several other types are mentioned here

https://en.m.wikipedia.org/wiki/Magnetometer