YES! After my last message here I was able to get in touch with Siemens (who took over Danfoss) Technical Dept, who very kindly called me back to answer all my questions. They said that in all these meters there's at least one digital output, which by using the on-screen menu can be programmed to put a pulse for every X volume units, and also there's an analog output that in the same way can be set up to provide a current that's proportional to the instant flow, so a link can be established between mA <-> liters/min
The project is actually alive, only pushed back by our client and we're still awaiting for some signatures and certification.
All these meters do have a local display+buttons (the MAGFLO 5000 referred above) whihc is the electronic part of the device that shows values and lets you program lots of variables
Thanks a lot for your answer!!
Eduardo