Why the TRU/FLO®? Combining the low-flow sensitivity of a T-10® disc-type meter with the high-flow capacity of a turbine-type water meter, the TRU/FLO® is specially designed for extremely wide flow rate applications such as apartment buildings, hotels, and hospitals. Its patented hydraulic valve transfers flow smoothly between disc and turbine sections, minimizing loss of accuracy in the crossover range.