Viron eQuilibrium Chlorinator is available in 4 sizes from 18 gm/hr to 45 gm/hr and in three versions – semi auto pH control, fully automatic pH control and fully automatic pH and Chlorine Control. The semi auto pH control has intelligent software to adjust the dosing rate of acid according to the eletrode output which affects the pH increase during operation. Add the pH sensor kit to fully sense and control the pH of the pool water automatically. Further add the chlorine sensor kit to automatically control chlorine levels in the pool. Correct pH and chlorine create perfect swimming conditions, help protect pool shell, interior finish and pool equipment. Select the intelligent Ai Mode when connected to a Viron eVo pump to allow the chlorinator to automatically determine hours of operation, chlorine production, pH balance and continually monitor and react to chlorine demand, even when pump is normally off.