Fluid flow meter head and system using same

- Mar 18, 2019-

An airflow meter head for fluid connection to a means for measuring differential fluid pressure to provide an indication of the velocity pressure for measuring fluid flow rate, comprising: a single hollow tubular member aving a wall dividing the hollow into two separate chambers, said member having a series of axially spaced openings from a first of said chambers through the member to open facing forwardly and having one or more openings from the second of said chambers through the member to open facing other than forwardly, the sum of the crosssectional areas of each series of openings being less than the cross-sectIonal area of the chamber associated therewith, said tubular member being provided with a spaced pair of rearwardly extending walls for creating a low pressure area therebetween when the tubular member is located in the path of fluid flow; means mounting the member in the path of fluid flow, with the forwardly facing openings facing the flow of fluid to provide a total pressure sensing chamber, and with the other openings facing other than towards the flow of fluid to provide a low pressure sensing chamber; and means fluidly connecting each of said chambers to the measuring means.