process variable
measured value of a particular part of a process which is being monitored, controlled, or regulated
en-GB/ˈpɹəʊsɛs ˈvɛəɹɪəbl/
en-US/ˈpɹɑˌsɛs ˈvɛɹiəbəl/
measured value of a particular part of a process which is being monitored, controlled, or regulated