In this research, we continue to design and manufacture an intelligent system to continuously identify and measure nitrate by installing it in the herbal filtration. The order of procedures of the systems is as following: first wastewater enters the filtration from reservoir then filtrated wastewater enters the container which included the electrode for determination of the existing nitrate. The controller is connected to the electrode from one side for receiving the incoming signals and from the other side it is connected to the electronic valve. If the existing nitrate covers the standard range, the A output will be opened and water will flows to the water reservoir and if existing nitrate be higher than standard range, the controller send the opening order to the B output that is connected to the wastewater reservoir for reiteration. Because of the limits for using of the electrode, we present the system stationary that includes a reservoir for keeping the wastewater. Experiments done on the samples taken of filters and mixing them to buffer liquid manually. Two tubes have been connected to the both side of the electronic valve to connect it to the reservoir. The waste water needed for the experiments has been collected from the wastewater pools of the Isfahan University of Technology. Wastewater enters the herbal filtration and first sampling applied after one weak the water stood steady in the filters. After the wastewater has been crossed from the filters continuously and the nitrate was measured from second to forth week. The results of the related voltages showed by controller and for the accuracy checked and compared by pH-meter results. The results of the research represented that according to the T-test and nonmeaningful difference between measured data by controller and data obtained by pH-meter, we can use this controller device in the system as a data viewer for reading the voltage. Also by finding out the results captured by experimentation of electronic valves, we find out that if the density in some samples be in the near range number as standard range for the controller, chance of the measuring error that result in opening of valve, exist in 11% that can be optimized by changing the default values.