I bought an AlphaLabs GM-2 Gaussmeter for another project, and measured the AC magnetic field strength touching these devices yesterday, since I really didn't have any idea beyond order of magnitude what they might be
Handheld tape head demagnetizer: 40 Gauss GC Elec 9317 CRT degausing coil: 70 Gauss Audiolab TD-3 desktop bulk eraser: 1000 Gauss Inmac 7180 or RS 44-233A handheld bulk tape erasers: 2000 Gauss also the DC field of a 1/4" button super magnet like on the backs of clip on badges is about 3000 Gauss
