Tire pressure monitoring systems
how accurate are they? worth the 300 price tag? Yes I do realize one answer reflects the other.
Forum Discussion
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 correct, they do not measure accurate tire temperature. They are simply measuring the ambient air temp at the end of the valve stem plus any heat gain from the sun on the black sensor housing. The only benefit is that if your brakes are overheating (from over-use or a problem with the drum/caliper) the heat would be transferred to the rim and the ambient would increase, which could possibly be detected by the sensor.
The TPMS is simply a relatively inexpensive tool to provide additional info to the driver and is not designed to provide precision temperature and/or pressure measurements. A system to do that would be significantly more expensive that no one would buy.
Lou
05 Travel Supreme Envoy
