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.

One-dimensional duct showing control volume ... the difference between the pressure sensed by the Pitot tube and the pressure of the surrounding air flow, it can give a very accurate measure of the ...

His experiments in air duct flow measurements, which previously delved into ultrasonic flow measurement, led him to try mechanical means. That calls for some kind of turbine producing a signal ...

An air duct between the air filter housing and the throttle body; Between two rubber or plastic air filter housing ducts or ...

Steep inter compressor ducts (ICDs) are a promising solution for reducing the ... This includes the ability to extract air from the ICD via an exhaust system. This means that all the major operating ...