Tire pressure monitoring systems

lanerd wrote:

Effy wrote:
How exactly do the external screw on sensors measure accurate tire temperature? Seems spinning on a cap outside the tire in the ambient air couldn't provide an accurate tire temperature could it?

You are missing the whole point of having a TPMS. You measure accurate tire pressure with an external gauge prior to the tires heating up. The TPMS is just to alert you of a tire malfunction caused by low/high pressure or temperature. Knowing accurate tire pressure going down the road is redundant as it changes with speed, altitude, temperature, road conditions....ect.

Ron

I am not missing the point, I am just asking a question. I get how they work and why, I was simply questioning that if a unit measures temperature, how does it do that accurately while being on the valve stem, spinning in the ambient air?