ATO One RO is a smart water replenishing device for meeting the needs of using RO water filter system. As long as the sensors and tubing are installed, it can work after powering on without any settings. The sensor uses a magnetic stand for easy installation and adjustment. The standard 1 channel optical level sensor is used to monitor the water level to determine whether it needs to be replenished. A 1-way float sensor is used as standard to prevent overflow. The ATO One for RO has various status indicators and audible and visual alarms.