Tire pressure monitoring systems

Effy wrote:

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?

By your own words you keep asking about "ACCURACY and we keep telling you it's NOT about accuracy. The sensor is there only to inform you of a deviation and alert you to its existence.

If you "know how they work and why", then you should understand that the sensor is attached directly to the valve core with the Schrader Valve depressed allowing the air/temp from inside the tire to come into contact with the sensor "inside" the sensor device. Ambient temps "outside" the device does not come into contact with the sensor "inside"...

You will experience "normal" deviation due to the existence of items I previously mentioned. It's only when the deviation "exceeds" the set values (either by you or the factory settings) will the monitor alert you of a problem.

Hope this helps to alleviate your concerns.

Have a great day.

Ron