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.

and mass flow controllers (MFC) particularly suitable for measurement and control in gas delivery systems and plant engineering applications. The mass flow meters and controllers of the red-y ...

The chaos was revealed in flight tracking data and audio exchanges between pilots and air traffic control, as reviewed by NPR. Audio from LiveATC.net showed confusion in the moments after the ...