It has 5 galvanically isolated measurement channels with which to make all cathodic protection monitoring measurements: ON potential, AC interference, junction current (shunt), power supply or drain current (AC and DC), instant-off potential on coupons, polarisation current, ground or tube-rail potentials. It can be powered by battery or by external power supply (solar or mains), features that allow it to be used on complex measuring points (e.g. joints), rectifiers, AC or DC drains. Measurements are taken by the device on a continuous basis and then processed in the daily report which provides comprehensive information on the evolution of measurements and of out-of-threshold over 24 hours. Prepared (with accessories) for remote control and/or cyclical interruption of rectifiers.