Measuring air flow in an HVAC duct can be a tricky business ... The principle behind the sensor [ItMightBeWorse] is working on is nothing new. He discovered a paper from 2015 that describes ...

An HVAC pressure sensor plays a crucial role in measuring and monitoring the pressure within heating, ventilation, and air conditioning ... regulate refrigerant flow. Proper airflow flow is ...

[Nubmian] set the transducers up in a PVC pipe and blew air into it with a fan ... the ground did the trick. For more HVAC projects check out this pinwheel flow meter and [Adam]’s piece on ...