Forum Discussion

Flanz's avatar
Flanz
Explorer
Mar 27, 2017

TPMS - Flow Thru or Non Flow Thru Sensors

I've decided on which TPMS I'll purchase, so I'd like to keep this thread about sensors, please. Also, my tow vehicle will NOT have flow thru sensors on it, so I'm only concerned with the MH.

I'm in the process of deciding which sensor I should go with. I like the easy of the flow thru sensors, but having them may be another point of failure since there's another Schrader valve involved. Since the motorhome has solid metal valve stems, I'm not really concerned about the sensors moving around while driving, but I'd like to hear opinions.

As for the non flow thru my only cocnern is removing them every time I go to check, air up, or down my tires. Do you find that the locking mechanism will have fatigue over time? Are they difficult to work with? Do I have to recalibrate the TPMS if I remove a sensor when I want to put a pressure gauge on the stem?

Just looking to make a purchase one time on a TPMS. I've never owned one and would like to get a feel for the sensors...

Thanks,
Paul
  • I've had both and prefer the flow through sensors. At least when my gauge says I have 95 psi, I know that the pressure will not decrease as I try to get the non-flow through sensors to seat properly. At least with the flow through sensors, they only have to be seated once.
  • I have a TST system. I had a problem w/ one tire going down w/ a sensor connection to my rear tires. I lost air until I could get it installed properly so it wouldn't leak. TST gave me excellent customer service and help even after 10 months from purchase. I can ocassionaly lose reading on one of my MH tires and one of my Toad tires. They say I need a signal booster installed in the back of the MH. They do give me peace of mind and I have been using them for about 2 years. I only had to add air after 1 year of installation to the tires so I don't see any reason to have the flow thru sensors.
  • I didn't see any advantage to the flow thru sensors since you still have to remove the valve caps, so I stuck with the standard TST sensors. I took off the spinning security covers so that removing them is no different than removing a regular valve cap. Without the security covers, the sensors are also lighter and smaller, making them less noticeable.
  • Effy's avatar
    Effy
    Explorer II
    The upside is that you can air up without removing them. The downside is - like you said - they add another point of failure. I have TST flow through and they don't. Something about them won't allow me to air up so I have to remove them to air up anyway. So from my experience They are a waste of money. Others may not have had the same issue. I have had 2 of my sensors fail. replaced by TST but even after replacement 2 more drop signal periodically. Everyone raves about TST but I've had a lot of issues with mine.