A popular measurement of the quality of a flow metering system is the ability to repeat the same flow indication at unchanging process conditions (flowrate, fluid properties, temperature and pressure). In the world of metrology, this attribute is termed "repeatability" and is one of the most talked about statistical quality measures of an instrument. "Reproducibility" is the ability of a measurement system, over a set of changing conditions, to replicate the same measurement.
Read here the article by Karl Stappert in the August issue of Flow Control:
So, how reproducible is your highly repeatable metering system?