Measuring device

A measuring device comprising:

• support base,
• a movable arm, having an extension prevailing along a longitudinal direction and being rotatable with respect to said support base along a rotation axis skewed with respect to said longitudinal direction,
• a probe constrainable to said movable arm,
• measuring means of said oscillation of said movable arm,
• first magnetic means comprising:
• at least one first magnetic element constrained to said movable arm,
• at least a second magnetic element constrained to said support base and not oscillating together with said movable arm,
• said first magnetic element and said second magnetic element being mutually movable along a movement trajectory,
• wherein said movement trajectory has a prevailing extension along said longitudinal direction,
• wherein said first magnetic element and said second magnetic element exerting magnetic force on each other in at least one position along said movement trajectory.