Using flowmeter measurements to improve quality

If the measurement had been done inline, a sudden deviation would be detected. Inline measurements can also be used to enable automatic closed-loop control, which is not possible with manual measurements. A typical closed-loop control strategy uses an inline measurement as the process variable input to a proportional-integral-derivative (PID) controller. The controller output drives some type of a regulating device, such as a control valve. The PID controller continually and automatically adjusts its output to maintain the desired value close to the setpoint. via