Not surprisingly there's not a forum called 'Magnetometers' so I hope I'll be forgiven for posting here instead.
I'll be using the MAG3110 magnetometer in a surveying application. This application will use the magnetometer to find compass heading from the earth's magnetic field. To get the best accuracy the sensor should not have any ferromagnetic materials nearby.
My question is how diligent do I have to be in keeping magnetic components off the circuit board? If I'm forced to use them then how far away do they have to be from the sensor to minimise their influence?
I've source non-magnetic resistors and capacitors as well as a low magnetic signature battery. But non-magnetic crystal oscillators seem less common. I don't want to spend lots of dollars and time on sourcing non-magnetic components unless there is a real benefit, but I don't know how to quantify that benefit.