A DEVICE FOR MEASURING THE VOLUME FLOW OF A FAN

摘要

Measuring device for measuring the pressure difference (DeltaP) and so that the volume flow (qv) of a fan, by measuring the pressure difference (DeltaP) in a measuring part (2) two chambers, located in the pressure in opening or its extension into the fan. Each chamber has orifices (5) of small diameter, the inner surface (8) of the housing (1) of the measuring device against which or near which is located the measuring part (2) being the tongue (10) or the tongue plate (9) of the mantle of the fan or the prolongation thereof. The measuring part (2) is installed in the housing (1) so that the direction (F) of the flow to be measured is substantially perpendicular to the length (c) of the measuring part.