Device for measuring magnetic fields...

[warbeak2099]

Can anyone suggest a cheap way to measure magnetic fields? I want to be able to test whether there is a significant difference in the strength of the magnetic fields of two different rooms. I understand a simple compass could be used, anything else? I can't get my hands on a voltmeter, the physics department here is a bit stodgy. If they weren't I could have just attached a wire loop to one of the leads on the voltmeter and I would have been in business. Otherwise I'd have to just buy my own voltmeter for like $100+. Screw that. Any household ways that anyone knows off besides a compass?

[d4m4don3]

Can anyone suggest a cheap way to measure magnetic fields? I want to be able to test whether there is a significant difference in the strength of the magnetic fields of two different rooms. I understand a simple compass could be used, anything else? I can't get my hands on a voltmeter, the physics department here is a bit stodgy. If they weren't I could have just attached a wire loop to one of the leads on the voltmeter and I would have been in business. Otherwise I'd have to just buy my own voltmeter for like $100+. Screw that. Any household ways that anyone knows off besides a compass?

100 bucks? Analog VM?


DMM's are pretty cheap nowadays.

[magmonkey]

a gaussmeter should do it
http://cgi.ebay.com/R-B-ANNIS-25-CAL...QQcmdZViewItem

[warbeak2099]

Gaussmeter that sounds like it would work. But it says you have to place it next to the item you're testing. I'm trying to test a room, will that work?