正好逛到... 參考看看...

...Model AML-6KG produces peak fields exceeding 8,000 Gauss (we have measured fields as high as 12 kGauss in spots), with 6,000 Gauss guaranteed. Previous equipment delivered only three erasing poles, at much lower levels, with the center pole strongest, and the other two much weaker....

...This unit meets or exceeds National Security Agency specifications for security erasure of floppy disks and hard disk magnetic media, and outperforms all other handheld sanitizing devices by a very wide margin... (僅節錄)

網頁：
http://www.appliedmagnetics.com/Dis...ng_Paddles.html