A dirt-detect sensor in the dock checks how dirty the recovered mop water is and can trigger automatic remopping in especially grimy areas, which reviewers say works well on muddy floors.
A dirty-water sensor in the dock can detect when wash water from the mop pads is unusually dirty and trigger extra cleaning passes in those areas, helping it keep heavily used rooms looking freshly scrubbed.
A built-in dirt detection sensor checks how grimy the return water is and can trigger automatic remopping passes when the kitchen is muddier than usual.
A dock-based dirty-water sensor checks how soiled the recovered mop water is and can automatically send the Edge S5A back for a perpendicular remop when it detects unusually dirty floors.
A built-in sensor monitors the dirty-water line and can trigger extra mop-washing cycles when the water is still dirty, keeping the mop pads cleaner with little user effort.
The L40’s dirty-water sensing can detect when mop wash water is still very dirty and automatically trigger a second cleaning pass in those rooms, adding extra scrubbing only when needed.
A dirty-water sensor in the base can detect when the mop wash water is unusually dirty and tell the robot to re-mop especially soiled rooms, adding targeted extra passes beyond the normal schedule.