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Old 02-19-2016, 10:55 AM   #31
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10-15 doesn't seem right. Mine read 3-4 lbs lower than my digital gauge, that's on 8 tires so I bought a new Accutire gauge to compare to. I have the 507 model but that shouldn't matter. I would continue to call TST, from what I gather they have great customer service/satisfaction and will make it right.
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Old 02-19-2016, 11:01 AM   #32
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My TST sensors read about 5+ pounds higher than what multiple digital and stick type gauges read. I just set my limits a bit higher to compensate. I trust multiple digital gauges more than the lone TAT reading.


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Old 02-19-2016, 11:21 AM   #33
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I will agree with what all of you have said . I emailed them and I will see what they will say. It's so strange I just when and checked the pressures on my toad and my gauges say 32 to 30 and the the Tst says 19 to 18 pounds . I'm not sure what sensors I have but they are not the past through. It's almost like I have it set for bar or one of the other pressure . But I have checked it 3 times this morning.
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Old 02-19-2016, 10:00 PM   #34
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I have the 507 and I will usually top off the tires then install the monitors and they are right on with the gauge read. Just lucky I guess.
They have saved us a few times from damaging the TT more than the blow out's did or the slow leak would have. Of course with the new trailer I will have to reset the thresholds for the higher pressures so we shall see what happens with that.
Happy camping.
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Old 02-20-2016, 12:56 AM   #35
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Originally Posted by joel ritchie View Post
I will agree with what all of you have said . I emailed them and I will see what they will say. It's so strange I just when and checked the pressures on my toad and my gauges say 32 to 30 and the the Tst says 19 to 18 pounds . I'm not sure what sensors I have but they are not the past through. It's almost like I have it set for bar or one of the other pressure . But I have checked it 3 times this morning.
I have the 507 system and all my sensors read 1 pound low which is far better than reading high. I have a calibrated digital pressure meter that I've checked them with. I'd say that the problem has to be with your monitor because ALL of your sensors wouldn't be that far off.

I would never tow without a good tire monitor after having our 507. We love ours!
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Old 02-20-2016, 08:55 AM   #36
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It if was one sensor reading low, I would say check the black washer inside the sensor. I had one start reading low after adding air to the tires. Removed both sensors, swapped side-to-side and the low reading went with the sensor.

Took a close look and there is a black washer inside the sensor to seal it when it is screwed onto the valve. On the low reading sensor the seal was not pushed down all the way and was actually slightly over the small round tube that pushes against the shrader valve to allow the air to enter the sensor.

I guess it was restricting the pressure so it was reading low. And was probably pulled up when removed from the valve to add air. I just pushed it back down in place and the sensor started reading fairly close to the pressure (about 1 lb off).
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Old 09-30-2016, 07:50 AM   #37
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Sorry for resurrecting an old thread but I am in the market to purchase a TPMS and most likely going with the TST 507rv.
But before I do, I was wondering how many people have chosen the FT (flow through) sensors. I am not thinking that this would be something that is needed but the kit with the FT sensors is the same price as the one without, so I thought I would ask.

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Old 09-30-2016, 08:01 AM   #38
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The real difference is the length and weight. The FT is like 1/8 oz. more but will stick out more some times beyond the rim. It depends on the person, and the rim your putting them on or really what is acceptable to you. I like the FT, if I add air I do not have to remove it. But also I do not hit curbs. Had them for two years already with no problems.... Suggestion put them on metal stems.
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Old 09-30-2016, 08:04 AM   #39
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The flow through sensors protrude a little further from the tire, even to the point of being outside the tire sidewall. Some feel this can make them vulnerable to damage from hitting a curb or whatever. Don't really see much of a problem there but it is a valid concern.

I went with the non-flow type and even removed the locks to get a lower profile. I rarely have to add air but if I do it only takes a few seconds...not a big deal.

Also, look closely at the advertised prices. I've seen the flow through and non-flow through shown almost identical but looking closer the flow through price is for four sensors and the non-flow through had six. I got the six sensor system so I could have readings from the trailer and truck spare tires (the truck OEM TPMS system only shows the four running tires, not the spare).
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Old 09-30-2016, 08:15 AM   #40
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The flow through sensors protrude a little further from the tire, even to the point of being outside the tire sidewall. Some feel this can make them vulnerable to damage from hitting a curb or whatever. Don't really see much of a problem there but it is a valid concern.

I went with the non-flow type and even removed the locks to get a lower profile. I rarely have to add air but if I do it only takes a few seconds...not a big deal.

Also, look closely at the advertised prices. I've seen the flow through and non-flow through shown almost identical but looking closer the flow through price is for four sensors and the non-flow through had six. I got the six sensor system so I could have readings from the trailer and truck spare tires (the truck OEM TPMS system only shows the four running tires, not the spare).
I'm with emm-dee... I bought the non flow through, removed the security locks and have a nice, lightweight sensor that doesn't affect the tire balance or stick out looking for trouble.

If I need to add air, all I do is unscrew the sensor, just the same as you'd unscrew the cap on a flow through or the cap on valve stem. Honestly though, adding air (to any tire) is not something I've had to do on such a regular basis that I've felt the need for speed.
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