SLS SELF LEVELING SYSTEM SLS SELF LEVELING SYSTEM CONSTANT HIGH CLEANING PERFORMANCES. SLS – mechanical or electronic system allows great cleaning performance by fully adapting brushes with floor unevenness. Applied to: CT 71 CT 51 CT 80 CT 110 CT 160 CT 230 Benefits The brush pressure with self-levelling and self-adjusting head allows a perfect fit between brush and floor. System available as mechanical, electromechanical or electronic according to machines models.