High flux field

[alansimpson]

I am testing the upper limit of hall sensors and I would like a quick and simple way of generating a high flux field over 10,000 to 20,000 Gauss, over 1 Tesla in a gap about 4 mm (0.15") wide. The field needs to be reasonably even over about 10x10mm (0.4") so that I don't get too much variation with position.

At the moment I have two 1" Neo. magnets 0.5T at surface and separated by 4 mm. I am getting good field up to 1 T.

thanks

 

[EdStainless]

build a small yolk assembly. A "C" made from good low carbon iron, your two magnets on the tips of the "C", and pole pieces on the magnets. I would taper the poles just a bit, but leave the pole faces twice the size that you need to help with uniformity. Engineer the size to give you your 5mm gap.

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