This system (1), intended for the estimation of at least one physical parameter of a region of a medium (M) comprising at least one electrolyte, comprises at least two electrodes (2), i.e. at least one working electrode and one counter electrode； a current generator (3) configured to deliver to the electrodes (2) a train of electric pulses of current, each electric pulse having a pulse duration； a computer-readable memory (4) comprising at least one predefined analytic model of an electric potential, between the working electrode and the counter electrode, as a function of time, receiving as inputs at least the current and the pulse duration and comprising at least one physical parameter of the medium (M) to be estimated； an acquisition unit (5) comprising a signal amplifier configured to acquire and amplify an electric potential recorded by the electrodes； and a processor (6) comprising a stimulation module (61) configured to control the current generator (3) so as to deliver a biphasic charge-balanced current during a stimulation duration； an acquisition module (62) configured to trigger an acquisition of an electric potential variation as a function of time during a time window comprised in the stimulation duration； and a calculation module (63) configured to receive the acquired electric potential variation of the region of the medium (M) as a function of time, fit the acquired electric potential variation using the predefined analytic model, and output a value of the physical parameter obtained from the fitting of the predefined analytic model.La présente invention concerne un système (1), destiné à l'estimation d'au moins un paramètre physique d'une région d'un milieu (M) comprenant au moins un électrolyte, comprenant au moins deux électrodes (2), c'est-à-dire au moins une électrode de travail et une contre-électrode； un générateur de courant (3) conçu pour délivrer aux électrodes (2) un train d'impulsions électriques de courant, chaque impulsion électrique ay
