Mass Air Meter vs. an Air meter......

Just checking to see of people know the difference.

 

are you talking specifically for the purpose of metering the incoming air to your engine, or at least your ECM doing so? Then i'd say mass is using heat resistance and air meter is an actually phyiscal device that measures air by movement (the worst in accuracy IMO, like a weather vane's physical resistance being measured).

 

Exactly

 

There are hot wire anemometers that just measure the velocity of the air using thermal resistance, with no ability to measure the mass of the air. So by saying that just heat is used to measure the mass of the air is incorrect. Other things need to be held constant in order to meausure the mass of the air.

 

I'm used to the hot wire design as being referred to a Mass Airflow Sensor, and Mechanical Designs (like Toyota's older design that had a flap that opened and closed in conjunction with a variable resistor, like a rheostat) being referred to as an Airflow Meter.

 

I was just being simple, even though if you wanted me to be complicated I still wouldn't of said that, over my head. LOL