How does Max excel at low-flow rates?

Low-flow is a relative term, but in all cases it means measuring at a rate well below the norm. To detect and report flow at 1/1000th of a meter’s full scale is a phenomenal feat. Max makes several meters with this turndown range and many more with 200:1 and higher ranges. What gives Max meters this ability? The meters are built so that they will continue to turn smoothly and repeatedly as low as 1 displacement per minute. Close tolerance machining specifications provide precision fits and simultaneously reduce drag. This, combined with very small displacements, creates a meter that can measure below 1 ml/min.