controlling mass flow rate

[purpletoes]

Hello is there any way that we can control mass flow rate of air coming with varying temperature? If there was a temperature range of -20 to +100 C I'm puzzled on how we can meaure flow rate with a varying density of air. Is there such a device that can measure it, say with a known CFM? Thanks

 

[HDS]

The Mass Air Flow (MAF)sensor on your car does this.

Many companies make mass flow controllers where a flow meter is connected to a servo valve and can provide a constant flow of gas.

 

[purpletoes]

Thanks for the reply. I have actually found a company that makes meter. bronkhorst is their name.