ABSTRACT
Flow measurement is the branch of the measuring technique which aims to measure the fluid flow, respectively the amount of fluid passing per time unit over the cross section of a transmission line, closed conduit, open channel, riverbed, etc. Flow measurement has its own characteristics, occupying a specific and important place within the measuring technique, which refers to the measurement of all physical quantities, setting the general rigors imposed on all measuring instruments. Totaling the amount of fluid for a specific elapsed time interval by integrating the flow, flow meters have a counting function referred to as counters of flow or counters, that is, meters. The Concept of Flow meters Unity are all types of flow meters are unitary among them, as highlighted by all points of view, respectively by their analytical bases variants of analytical expression of flow, structures basic structure and detailed structures as well as by their classification.
