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- since 1996 -
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Technical Discussions
Mahmoud M
Mahmoud M
05:06 Jul-15-2003
MFL and LFET

What the difference between MFL with permanent magnets and use low frequency electromagnetic technique


 
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Dana H. Ives
Engineering
CoreStar International Corp., USA, Joined Jan 2003, 10

Dana H. Ives

Engineering
CoreStar International Corp.,
USA,
Joined Jan 2003
10
02:34 Jul-21-2003
Re: MFL and LFET
: What the difference between MFL with permanent magnets and use low frequency electromagnetic technique
.
In a nutshell: MFL uses permanent magnets with all the possible problems associated such as breakage, collection of debris, difficulty in smoothly transiting surfaces that are irregular, etc. LF Electromagnetic techniques require more sophisticated coil excitation circuitry with its associated filtration requirements due to LF noise, lower scan speeds to reduce missing anomolies, etc.


 
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