A miniaturized electrochemical cell (2) comprising a main body (20) comprising a tip (21) wherein inlet (41) and outlet (51) hollow conduits of millimeter-size diameter are hollowed out separated by a partition wall (200) integral with the main body (20) in which an electrolytic liquid solution (10) flows, in a space between the tip (21) and a surface (90) of a conductor material to be analyzed (9) is identified a millimeter-size chamber for redox reactions (6), the tip (21) of the main body (20) comprises a millimeter-size opening (210) of millimetric dimension in communication with said millimeter-size chamber for redox reactions (6).