What is the sensor by the air filter?

[CombatComProg]

I am installing a 9" cone filter and see that there is a sensor in the elbow between the MAF sensor and the stock filter? What is the sensor called and what is it's effect on our cars? Where should I insert it in my new setup, which is an ATR MAF pipe, MAF sensor, followed by 9" cone? Thanks!

 

[Lunkan]

http://www.turbobuick.com/forums/showthread.php?s=&threadid=132039

 

[Dan Thompson]

Something like this?

The sensor in the black hose by the fender brace is the MAT sensor (air temp).

www.geocities.com/cx366464/front.html