What is the role of a sensor in a control system?

The role of a sensor in a control system is crucial as it provides the necessary data regarding process variables. Sensors measure various physical phenomena such as temperature, pressure, flow, or level within a system and convert these measurements into signals that can be interpreted by the controller. This feedback is essential for the controller to make informed decisions and adjustments to maintain the desired setpoint. By continuously monitoring the process, sensors enable the control system to respond to changes and variations, ensuring stable and efficient operation.

In summary, the sensor acts as the eyes of the control system, allowing it to monitor real-time conditions and facilitate precise control.