Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

University of Helsinki researchers working in the SootSense project are developing an instrument for measuring the concentration of black carbon more accurately than before. As regulation increases, ...

which is affected by the kinetic energy of the moving air. Dynamic Error: The discrepancy between the actual measurement and the true value due to changes in flow conditions or instrument response ...