METHOD FOR DETECTING AND MEASURING A LAYER DEPOSITED ON A SURFACE IN CONTACT WITH A LIQUID MEDIUM AND DETECTION AND MEASURING SENSOR IMPLEMENTING THE SAME

The present invention relates to a method (100) for detecting and measuring a layer deposited on a surface in contact with a liquid medium, able to discern the nature of the deposit, comprising the steps that consist of positioning at least one pair of electrodes (11) arranged at a mutual distance (D) on the surface in contact with a liquid medium; sending to the at least one pair of electrodes (11) a signal having signal frequency (f); and detecting the impedance (Z) between the at least one pair of electrodes (11) and it is characterised in that the signal frequency (f) is selected in such a way as to measure the resistive component of the impedance (z), the signal frequency (f) being greater than or equal to the zero frequency (f0) given by the double layer capacitance (CDL) and by the resistance (RSOL) of the liquid medium in which the measurement takes place.