Talking about a wire potentiometer, I was wondering about the way it could be used after installation. as you know, wire sensors have a roll of wire inside them that come out of a hole, and it sounds like that the wire should always remain direct and in the same orientation as it comes out.
for example in this link
you can see that the wire is always held along one axis , let's say X axis to verify the length of the wire:
if my interest is the length change ( not the absolute current value) of the wire, and the wire does move not only in X direction, but let's say also in Y (and or) Z direction , while my interest is in $\delta L$ of the wire, not only in one certain axis, how much error would we introduce to the measurement ? is there a way to approximate that ?