Thanks, dgallup! I'm currently prototyping with cylindrical neodymium N42 magnets from K&J, 0.2 - 0.31" dia, 0.5 - 0.63" long. Typical Br max is approx 13,000 Gauss. A 0.25" coil-target distance should be manufacturable. K&J's field strength calculator tells me I will see 400 Gauss with those...
Thanks, MagMike, however you have misunderstood the question. I am not asking what type of magnet to use in the sensing coil, I am asking what is the best material for the *target*. In the guitar pickup analogy, that would be akin to asking what is the best material to make the string out of. In...
Argh, my first post here and there's a typo in the topic title. Sigh.
Thanks for the reply, IRstuff. No, this is not for school - I have 35+ years of experience in my field (which doesn't usually involve a whole lot of magnetics, hence my inquiry to this fine forum).
There are indeed many...
I'm designing a sensor that needs to convert mechanical vibration in a target object to an electrical signal. The situation is very analogous to a guitar pickup, where a magnet or pole piece is surrounded by several thousand turns of wire, except that in my case I have some control over the...
