Patent ID: 8898918

Claim:
A length measurement instrument ( 10 ) comprising an inductive sensor ( 11 ) comprising an elongate body ( 14 ) having a longitudinal axis and a feeler tip ( 17 ) movable along the longitudinal axis ( 15 ) of the sensor, in which the body ( 14 ) contains windings and defines a first cavity receiving a magnetic core, the instrument further comprising a casing ( 13 ) extending the body ( 14 ) along the longitudinal axis ( 15 ) and co-operating with the body ( 14 ) to define a second cavity ( 16 ) that is leaktight and that contains the feeler tip ( 17 ), the casing comprising a watertight deformable part ( 18 ) surrounding the feeler tip ( 17 ) and an abutment portion ( 19 ) extending in line with the feeler tip ( 17 ) and wherein the capacity of the casing for elastic deformation along the longitudinal axis ( 15 ) is greater than the capacity of the casing for elastic deformation along axes orthogonal to the longitudinal axis; and the capacity of the casing for elastic deformation along the longitudinal axis is sufficient for the feeler tip ( 17 ) to be sensitive to movement of the abutment portion ( 19 ) under the effect of an abutment force exerted on the abutment portion ( 19 ).