PID controller is used in a variety of industrial process control applications. This is used in approximately 95% of the closed-loop activities in the industrial automation sector. PID is coupled in such a way that a control signal is produced. It gives the control output at the desired levels as a feedback controller. PID controller is implemented using analogue electrical components prior to the invention of microprocessors. Its instructions are also embedded into programmable logic controllers. This has long been employed in process control applications due to its flexibility and dependability.