Control engineering is fundamental discipline in engineering,and is related to producing a desired set of occurrences in a particular physical system. The physical systems involved may vary from electrical circuits to guided missiles to robots. Process control deals with control engineering where it involves process encountered in the field of chemical engineering these process are likely to involve one or more of momentum transfer ,heat transfer,mass transfer and chemical reaction. Therefore,process control is the means by which the chemical engineering control a chemical process in order that the process occurs in the desired way.