Magnetic strength behind non magnetic enclosure
Magnetic strength behind non magnetic enclosure
(OP)
I am looking at new enclosures and encapsulants for some magnetic based motion sensors. The materials used are nonmagnetic. I am not quite sure how much of an affect, if at all, changing these materials would have on the sensors ability to pick up pulses generated outside the enclosure (ie what would the affect be on the range). Is there any relationships, equations, or reference material that I could use to quickly evaluate this based on know parameters such as density, material, or thickness.





RE: Magnetic strength behind non magnetic enclosure
actual cat -- there is no way to skin a generalized cat.
If you want help, describe the actual problem .
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read FAQ240-1032
RE: Magnetic strength behind non magnetic enclosure
I have a magnet inside a plastic material of a known thickness. If I switch to another material, be it plastic, rubber, or cardboard, will the strength of the magnetic field outside of the enclosure be affected? If so, is there a way to compare two materials based on commonly specified properties from a data sheet without having to run comparision testing for all materials being considered?
RE: Magnetic strength behind non magnetic enclosure
If you had switched to a ferromagnetic material (iron, nickel, cobalt or one of their alloys), then things get very tricky and there is no general relationship for determining the effect. One has to resort to FEA/BEA.
RE: Magnetic strength behind non magnetic enclosure
The distance is the big factor.
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Corrosion never sleeps, but it can be managed.
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RE: Magnetic strength behind non magnetic enclosure
RE: Magnetic strength behind non magnetic enclosure
Would I be correct in inferring from the above posts, that for my specific application that materials with low conductivity are better?
RE: Magnetic strength behind non magnetic enclosure
You are correct in that a non-ferromagnetic, low conductivity material would be best.
RE: Magnetic strength behind non magnetic enclosure
Gareth P. Hatch, Ph.D.
Director of Technology
Dexter Magnetic Technologies
http://www.dextermag.com