Abstract: An in-line flow meter assembly for insertion into a pipe section, including a body comprising an elongate tubular section having a cavity; a turbine assembly support extending a determined distance from the body; a turbine shaft attached or coupled to the turbine shaft connection portion; a turbine element having a plurality of rotor blades extending radially from a central hub of the turbine element; a bearing positioned on the shaft and press fit into a hub of the turbine element; a pickup coil that is able to sense rotational motion of the turbine element and convert the rotational motion into a pulsing electrical signal; a riser having a height such that when the riser is attached or coupled to the pipe section, a rotational axis of the turbine element is located in a cross sectional center of the pipe section, regardless of a diameter of the pipe section.

Abstract: A flow meter includes a cylindrical flow chamber having an axis and an internal cylindrical wall. Axially spaced about opposite ends of the flow chamber are an inlet and an outlet. Both the inlet and outlet are oriented generally tangential with respect to the interior cylindrical wall. Rotatively mounted about the axis of the chamber is a rotor but wherein the rotor is mounted within the chamber between the inlet and outlet. Fluid entering the chamber via the inlet tends to spiral around the axis of the chamber and generally moves axially in the process to where the fluid engages and turns the rotor but wherein the fluid continues to move axially through the chamber to where the fluid exits the outlet.

Abstract: A positive displacement flow meter includes a pair of smooth oval shaped rotors mounted to a pair of spaced apart rotatable shafts contained within a sealed housing. The rotatable shafts penetrate the measuring chamber and have a pair of toothed, oval shaped timing gears located in a separate gear cavity chamber which are responsible for synchronizing and maintaining the relative orientation of the smooth faced rotors with respect to one another. The fluid that is being metered forms seals between the rotating surfaces of the rotors, as well as between the rotors and the wall of rotor chamber, thus the inlet and outlet plenums are physically isolated and are consequently not in direct communication at any point during the rotation cycle of the rotors. Thus, each rotation of the rotors results in the transport of a precise and known volume of fluid from the inlet plenum to the outlet plenum.