A microfluidic chip comprising a microchannel fillable with a liquid, the microchannel comprises a pair of electrodes, and a liquid flow path defined between the electrodes, wherein each of the electrodes extends along the flow path and parallel to a direction of a liquid filling the microchannel, in operation, and an electrical circuitry connected to each of the electrodes and configured to continuously measure, via the electrodes, a capacitance of the electrodes being wet by a liquid continuously filling the flow path, as a function of time, in operation.