Abstract: In today scenario Industries use different types of process variables and parameters for measurement. Among that pH is the most important parameter. These pH measurements are prominent in the industries like food & beverage, power plant, paper industries, paramedical industries etc. The smaller change in pH (amount of acid added, base solution and time) will lead to tedious effects in the process. The control of the pH process is also non-linear in nature and maintaining the pH value in the process is difficult for the desired transient response. In order to reduce problems fuzzy based system was designed and it is efficient than conventional integral controllers.

Keywords: Control of pH process, Fuzzy logic, MATLAB.