Wednesday, November 30, 2022

MENU

Internal vs. external TPMS temperature test results for warm weather

0
(0)

RV Tire Safety
with RV tire expert Roger Marble

Previously I posted the test results for my comparison of internal versus external sensor TPM systems. The weather was cool (“How accurate is your TPMS – Part two”) to cold (“More on internal vs. external TPMS temperature reporting”) back in March. Now I can report the results with the ambient temperature in the upper 80s.

All temperatures are in degrees Fahrenheit.

Internal System:

RF 102   LF 104   RRO 104   RRI 111   LRI 111   LRO 102

External System:

RF 73   LF 75   RRO 71   RRI 71   LRI 82   LRO 80

I was driving 65 mph with cruise on a level stretch of Interstate. The sun was fully on the left side of the RV.

Difference between Internal and External:

 RF 29   LF 29   RRO 33   RRI 40   LRI 29   LRO 22

These results tend to match the previous runs with the internal reporting about 30 F hotter than the external sensors.

Again I do not consider the results of a comparison between the temperature readings to be “meaningful” in the sense that the internal sensor numbers are useless.

Suggestion:  If you have an external sensor TPMS I would continue to use that system. Just be aware that the temperature readings are probably in the range of 27 to 40 F cooler than the temperature readings your friend would be getting with their internal sensor system. If you are concerned, you could change your High-Temperature warning level with your external sensor system from the factory 158° F to about 145° F.  Just be aware that if in Phoenix or Death Valley or other location where the ambient temperature exceeds 120° F,  you may get a high temp warning. If you do, just pay attention to the pressure readings to be sure you are not losing any air pressure.

Since tire temperature is also a function of load and speed, you might bump up the High-Pressure warning level 5° F until you are not getting a warning simply because it is hot outside.  Of course, it might also help to slow down a bit as that will also result in lower tire temperature.

Bottom Line: There is a difference between temperature readings based on sensor location. BUT this does not automatically make one type of system better or worse than another. As I said in this post, I am not a fan of TPMS temperature readings no matter which type sensor you run.

Read more from Roger Marble on his blog at RVtiresafety.net.

##RVT855

 

 

Did you enjoy this article?

Click on a star to rate it!

Average rating 0 / 5. Vote count: 0

No votes so far! Be the first to rate this post.

We are sorry that this article was not enjoyable for you!

Let us improve this article!

Tell us how we can improve this article?

Comments

Subscribe
Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Inline Feedbacks
View all comments

Subscribe to our newsletter

Every Saturday and Sunday morning. Serving RVers for more than 20 years.