Machine leveling with centesimal bubble

The centesimal bubble is a high precision level that is used frequently for leveling of machine tools with a resolution of 2/3 hundredths of a millimeter per meter, depending on models, it’s also used for the leveling of not squared pieces before milling and in any case on anything that requires a perfect plane.

The centesimal bubble does not use the usual cylinder with a green liquid, but an ampoule with a precise toric curvature.