What is a Process Variable?

The Process Control Loop

A process variable is the physical and chemical  properties of a process that is being controlled. common examples of PV or process variable are the temperature of a room, pressure and flow of fluid passing through a pipe, level of water in a tank and more.

 

These parameters are subject to changes depending on the requirements of the process. Click ( The Process Control Loop ) to understand more about the process variable and how it is controlled in a process control.