A measuring device 1 configured to receive a drill bit 3, and determine the relative displacement of the drill bit 3, is disclosed. The measuring device 1 is configured to be deployed proximate to the material to be drilled, reset, and subsequently determine the relative displacement of the drill bit 3. The measuring device 1 can be used in orthopaedic surgery procedures for determining the depth of a bore hole in bone.在此揭露了一測量裝置(1),該測量裝置被配置成用於接受一鑽頭(3)、並且確定該鑽頭(3)的相對位移。該測量裝置(1)被配置成用於部署在待鑽孔材料附近、進行重置、並且隨後確定鑽頭(3)相對位移。該測量裝置(1)可以在整形外科過程中用於確定在骨骼中開孔的深度。1‧‧‧測量裝置3‧‧‧鑽頭5‧‧‧導管15‧‧‧殼體17‧‧‧顯示器19‧‧‧重新開機按鈕21‧‧‧端