A DP sensor placed near the end of the circuit will assure (assuming it is being used as an input to a controller which is in turn controlling a variable speed pump) that there is enough pressure differential to satisfy the flow requirements of the furthest load.
A DP sensor placed near the end of the circuit will assure (assuming it is being used as an input to a controller which is in turn controlling a variable speed pump) that there is enough pressure differential to satisfy the flow requirements of the furthest load.