Abstract: A body (12) containing a substantially cylindrical bore (14) as fluidly connected in a straight pipe run, the bore having opposed relatively upper and relatively lower wall portions (94,96) and opposed side wall portions. A pair of substantially solid wedge members (30,32) are detachably secured to the side wall portions and project toward the bore axis (34), partially blocking the flow of fluid through the bore to produce a differential pressure upstream and downstream of the wedge members. Sensors (64,66,68,70) are provided upstream and downstream of the wedge members, through the side walls of the bore, to obtain differential pressure measurements from which the fluid flow rate can be computed.

Abstract: A flow metering assembly has a one-piece rigid body having a cylindrical bore with a segmental wedge therein, and a differential pressure transmitter, or the like, clamped thereto to receive the pressures developed on either side of the wedge in response to flow. The bore and wedge have a sliding fit with each other, the wedge is releasably fixed in place in the bore, and the assembly is inserted in a pipe line through which flows a fluid which is to be measured, such as fuel oil.