The new, all-encompassing instrumentation package includes pressure, valve position, and flow data from valve mounted pressure and position transmitters. The data is assimilated into a proprietary algorithm program to arrive at a flow measurement. Metered flow through the main valve can be used for flow indication or flow control. It also retransmits flow and transmitters measurements to PLC/SCADA via 4-20mA signals
https://www.cla-val.com/electronic/power-generators-and-flow-meters/xp2f