TPMS: What's the latest?

BB_TX wrote:
I had the TST507 with screw on sensors and wasn’t quite sure how the temperature was derived with those spinning in free air. But I didn’t care about the absolute temperature, only if one was significantly different than the others.

The free air reduces the sensor temperature and even more so with metal stems. I've measured 20-50 degree differences. This is based on internal sensors with non replacable batteries that were not replaced during the last tire replacement. The psi difference between the 2 systems varied by 1 psi.

I suspect TST adjusts for the temperature and it's a non issue. One possible clue is that they recommend to not change the maximum axle temperature while setting up the initial high and low axle psi values. They don't state the reason for this recommendation.