The unit type OS3015 is universal applicable for automatic monitoring and control of reverse osmosis plants. The controller is not equipped with an conductivity 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.