Device for continuous measuring of an analyte comprising a fixed element and a disposable and exchangeable element, wherein the fixed element Is placed on the user's skin and which in turn comprises an intelligent core for controlling the disposable and exchangeable element coupled thereto, wherein said disposable element incorporate an automated multi-puncturing system programmable over time comprising a plurality of puncturing units for sampling, wherein said puncturing units comprises a micro-needle and means for driving said micro-needle comprising a winding responsible for inducing an electromagnetic field on a ferromagnetic material integral to the micro-needle such that it is displaced to the sampling position In a manner proportional to the intensity of the field induced such that puncturing at different depths Is allowed characterised in that the puncturing units are formed by: - A central compartment comprising: o the micro-needle surrounded in its upper portion by the piece made of ferromagnetic material In the upper pole of which there is an empty space intended to be filled with the sample fluid and the lower pole of which has a base serving as a stop as the micro-needle advances through a space of the lower portion of the central compartment, o an opening in the lower base for the passage of the micro-needle in its displacement; and o an elastic spring which allows recovering the micro needle bringing it to its resting state In the upper portion of the central compartment, and/or a magnet located top wise serving to maintain the micro-needle in the upper position at the ready for the induction of magnetic field in the winding which command the puncturing. and - an upper compartment located above the central compartment comprising a biosensor; - A central compartment comprising: o the micro-needle surrounded in its upper portion by the piece made of ferromagnetic material In the upper pole of which there is an empty space intended to be filled with the sample fluid and the lower pole of which has a base serving as a stop as the micro-needle advances through a space of the lower portion of the central compartment, o an opening in the lower base for the passage of the micro-needle in its displacement; and o an elastic spring which allows recovering the micro needle bringing it to its resting state In the upper portion of the central compartment, and/or a magnet located top wise serving to maintain the micro-needle in the upper position at the ready for the induction of magnetic field in the winding which command the puncturing. and o the micro-needle surrounded in its upper portion by the piece made of ferromagnetic material In the upper pole of which there is an empty space intended to be filled with the sample fluid and the lower pole of which has a base serving as a stop as the micro-needle advances through a space of the lower portion of the central compartment, o an opening in the lower base for the passage of the micro-needle in its displacement; and o an elastic spring which allows recovering the micro needle bringing it to its resting state In the upper portion of the central compartment, and/or a magnet located top wise serving to maintain the micro-needle in the upper position at the ready for the induction of magnetic field in the winding which command the puncturing. - an upper compartment located above the central compartment comprising a biosensor;