By referring to the measurement principle of individual anode current through obtaining the magnetic field near the anode

a new non-contact measurement of individual anode currents based on the principle of electromagnetic field

was developed.The error distribution of the anode current on various current risers in aluminum reduction cell was analyzed and the measurement method was optimized to realize anode current real time monitoring and on-line control.The relative errors of anode current in 300 kA cell were within ±0.25%

but the relative errors of anode current in 400 kA and 200 kA cells were ±0.8% and ±3% respectively.Current risers had an influence on the relative errors of anode current

but the maximal error was within 3%.Therefore

the non-contact measurement was applicable to online monitoring of individual anode current with different current risers and structures in aluminum reduction cell.