When a process controller is located a distance from the sensing element, what does the sensing element send its signal to?

In refrigeration systems and process control, when the sensing element is situated away from the process controller, it typically communicates its measurements to a transmitter. The transmitter serves as the intermediary, converting the signal received from the sensing element into a form that can be easily transmitted over longer distances to the control system. This is essential to ensure that the controller receives accurate and timely data on the conditions being monitored, such as temperature or pressure, even when physical distances separate the components.

The transmitter's role is particularly crucial because it not only sends the signal but often conditions it as well, enhancing the reliability and accuracy of the data being sent to the controller for processing and control actions. This allows the controller to make informed decisions based on up-to-date information about the system's condition.