Fluid flow meter head and system using same

摘要: The fluid flow meter head for installation in a duct to measure the therein and thereafter control rate therein, includes an elongated hollow tubular member mounted of fliud duct, said having spaced walls extending rearwardly therefrom create low pressure therebetween, central wall dividing into two separate chambers, series axially openings facing opening one chambers provide total sensing chamber, across second chamber static connecting means from each measuring differential indication air rate.