The OS3020 operating control is used to fully automatically monitor and control very simple water treatment systems, which operate according to the reverse osmosis principle. The unit type OS3020 is universal applicable for automatic monitoring and control of reverse osmosis plants. The controller is equipped with a conductivity meter without temperature meter. There are four possible stages : "Stand by", "Production", "Rinse after production" and "Rinse during standby". This unit can monitor conductivity and several inputs e.g. level switches, low pressure switch, exceeded pressure and stop. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.