The Emonio P3 energy data logger measures the current in a phase via the electromagnetic field of the current-carrying conductors. The inner diameter of the Rogowski coils should therefore match your measurement task. Each Rogowski coil can be configured for currents from 100 A to 3000 A. The size of the internal memory is also decisive for the success of your measurement. Here you have the choice between 8 MB and 16 GB. Do You Have Questions? Talk to us, we will advise you.