What is the polarization effect?

The polarization effect impacts two electrode EC probes.

Polarization effect impacts two electrode EC probes, and happens when a charge builds up between the two electrodes of the sensor. This charge can be a result of varying resistance because of salt deposition on electrodes. This extra charge can cause your readings to be falsely low. Polarization effect is more prominent in metal electrodes and can be minimized by using graphite for the electrode probes instead of stainless steel. Periodic cleaning of the electrodes will also minimize deposits and reduce polarization effect.