What is the difference between these two TPMS systems.

JoeH wrote:

rgatijnet1 wrote:
I had flow through sensors and never had any trouble with them. Airing up the tires was no more difficult than if they were not there. The advantage is that I could LOCK them in to position which discouraged theft of the $50 sensors.
The sensors that you have to remove to add air are either kept loose or you have to use an Allen wrench to loosen them each time you want to add air.

The TST's don't use an allen wrench-- there is a special wrench that grips the base of the sensor below the anti-theft collar that you use to remove it to add air. Takes the same amount of time as removing a standard valve cap.

X2 it's the same exact little tool to install or remove either style. There is no Allen key.
I have the standard 507 and removed the anti theft collars from all of sensors

Another vote for the Flow through. I used them for about 6 years and had no problems. Now with the new coach I have Pressure Pro and will probably switch them out for a TST flow through system. The PP pressures are not accurate and I'm tired of having to take them off each time to check my pressures.

rgatijnet1 wrote:
I had flow through sensors and never had any trouble with them. Airing up the tires was no more difficult than if they were not there. The advantage is that I could LOCK them in to position which discouraged theft of the $50 sensors.
The sensors that you have to remove to add air are either kept loose or you have to use an Allen wrench to loosen them each time you want to add air.

The TST's don't use an allen wrench-- there is a special wrench that grips the base of the sensor below the anti-theft collar that you use to remove it to add air. Takes the same amount of time as removing a standard valve cap.

I had flow through sensors and never had any trouble with them. Airing up the tires was no more difficult than if they were not there. The advantage is that I could LOCK them in to position which discouraged theft of the $50 sensors.
The sensors that you have to remove to add air are either kept loose or you have to use an Allen wrench to loosen them each time you want to add air.

We have had the flow throughs on our coach for several years with no problems at all. I'm surprised at all the comments to not get them?

Go for the NON flow through.
TST has amazing customer service. You will be very happy.
Oh, FYI, find the best price online anywhere, and they will match it, if you call them.

Only problem I have heard about the flow thru is that they are very slow to take air if you need to add more than a few pounds.

I have the standard sensors. It doesn’t take much more effort to remove a sensor than to remove a valve cap to add air. And no restriction on air flow.

Any specific reason for not recommending the flow through sensors?

Yes, standard valve cap style sensors versus flow-through sensors. I don't recommend the flow-throughs...

Flow through sensors I expect?