Here I explain the complete instrumentation control loop on the swimming pool video. This is used to reduce contaminants in swimming pool water. A piping and instrumentation diagram is an articulate drawing of a processing plan that entails the piping and process equipment with its instrumentation and control machinery. It displays the piping and associated parts of a physical process flow. Such diagrams are famous in the engineering field. Learn more details from this PID, and try to make yours with ease.