510rob wrote:this is a crude sketch of what I was thinking about, but realizing it never went anywhere because other things in life have been higher priority
gray = a lump of threaded steel, perhaps with some kind of favorable tip geometry (a flathead screwdriver blade kind of idea, to focus the magnetic field.
black = melexis sensor
blue = some kind of small neo magnet, glued to the back of the sensor. the datasheet suggests using cyanoacrylite (super duper glue).
The top end could be encased in epoxy for long-term protection. blah blah blah... It always seemed like it could work quite well, but it also seemed like it could turn into a mini science project.
btw, that sensor is very intriguing, It's now on my shortlist. Thanks for sharing!