A water detection device comprising at least one fuel cell comprising a first electrode, a layer of electrolyte, a second electrode and an electrical measurement device characterized in that the first electrode of the cell is in contact with a first face of a porous silicon substrate comprising Si\u2014H bonds, in such a manner as to liberate a flow of hydrogen in the presence of water. For the particular layers the updating of the channel cue is associated with the particular column involving at each iteration one updated metric cue selected from all the metrics cues of the particular column. The first and second sets of integrated data are averaged, and a touch on the touch panel is detected based on the average of the first and second sets of integrated touch data. The relative location of each asset may be determined with reference to known location of some badges by employing reference badges. When switching off the engine, a relief of load of the compressing device is initiated in addition to the reduction of the metering of fuel.