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A '''process variable''' is the current status of a process under control. An example of this would be the temperature of a furnace. The current temperature is called the process variable, while the desired temperature is known as the [[setpoint (control system)|setpoint]].
Measurement of Process Variables are important in [[controlling]] a process. The Process Variable is a dynamic data which changes rapidly. So it becomes necessary to measure process variables for the maintenance of accuracy in a process.
[[Category:Control theory]]
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