1/ A vernier gauge.
2/ If you can attach a linear potentiometer it would be reasonably good.
3/ How accurately do you want to measure that spacing? Over what max/min range?
magnetics, sound or IR won't work.
Allan
1/ A vernier gauge.
2/ If you can attach a linear potentiometer it would be reasonably good.
3/ How accurately do you want to measure that spacing? Over what max/min range?
magnetics, sound or IR won't work.
Allan