A computer-implemented method of simultaneously providing a plurality of unique and dynamic messages on a user interface page is provided. Because an IPDS print session may not usually be interrupted, non-IPDS print data is received through a separate, non-IPDS channel in the printer control unit. The processor outputs the estimated flow rates for presentation via a user interface, and receives via the user interface one or more updated values corresponding respectively to a flow-estimation parameter. The system and method provides a quick comparison between on-resonance and off-resonance modes and enables sensitivities that approach the shot-noise limit.