Averaging orifice primary flow element

A differential pressure flow meter for determining the volumetric rate of fluid flow in a circular fluid conducting conduit, comprising:

• an annulus having a central opening that corresponds in shape and size to the inside fluid conducting section of the circular conduit,
• a supporting arm rigidly attached to and supported by the annulus and extending radially outwardly from the annulus, wherein the supporting arm comprises first and second interiorly disposed fluid transporting conduits, and
• a pitot tube type of fluid flow meter having a body that includes upstream and downstream facing surfaces carried by and mounted diametrically across the central opening of the annulus with at least one port disposed in each of the upstream and downstream facing surfaces, wherein the at least one port in the upstream facing surface is fluidly connected to one of the first and second fluid transporting conduits and the at least one port in the downstream facing surface is fluidly coupled to the other one of the first and second fluid transporting conduits.