I'm looking to build an air flow meter that will output in standard liters per minute. The cheapest sensors seems to be a car's Mass Air Flow sensor. I'm wondering if there is a way use one of these MAF to measure air flow in liters per minute.
Essentially I need to measure a medical ventilator's air flow in order to calibrate it. The gas flow analyzers that are normally used are way too expensive and offer too many extra features that I don't need.