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11-12-2015, 02:38 PM
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#1
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Senior Member
Join Date: Feb 2011
Posts: 184
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TST 507 Tire Monitoring System Critique
I have now had occasion to utilize my TST 507 TPMS System on two long trips between Michigan and Florida.
Over a three day travel period each way, tire pressure was checked/reset each morning prior to starting the days travel. The one thing I noted on a consistent basis is that the sensors displayed a good bit of non-linearity. After my most recent trip from Michigan back here to Florida I found one sensor that was consistently four (4) to six (6) PSI lower than the other five (5) sensors, even when moved to a different wheel. The five sensors that closely parallel each other were typically within one (1) or two (2) PSI of each other and were always 2 PSI lower than the initial pressures set each morning with an AccuGage analog inflator that compared exactly against an Accutire digital gauge.
I wonder if my experience is at all typical to that of others who are using the TST 507 System.
Also, I would like to recommend to TST that they might consider moving to a backlit monitor display instead of the current front lit display to improve on daylight readability. I find it almost impossible to read the display at even arm’s length unless the screen is bathed in bright sunlight. Having an easy to read display is very important when you are driving and trying to keep your eyes on the road as well.
__________________
Jeffery
2003 Holiday Rambler Admiral SE W22 8.1L
Summer in Michigan, Winter in Foley, AL
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11-12-2015, 04:04 PM
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#2
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Senior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 3,474
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I concur 100% with your last paragraph.
__________________
2021 DSDP 4326 Freightliner
2023 Winnebago ERA 70A
2005 KSDP 3910 Spartan
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11-12-2015, 04:23 PM
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#3
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Senior Member
Join Date: Sep 2012
Location: Tarpon Springs, Fl.
Posts: 1,540
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I feel the same way about the display during day light drive and have actually called TST to address the problem. Answer is that they are developing a color display screen which should be ready in the next few months so I told them to sign me up. guess I'm first on the list.
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11-12-2015, 04:42 PM
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#4
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2009
Location: Manitoba,Canada
Posts: 2,789
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I have had the TST 510 system for several years. The situation with my sensors pretty much matches yours. Last year I sent the system back to TST and had them service it. They sent it back with all new sensors. The situation remains. I have become used to it.
I agree with the monitor brightness.
Jim
__________________
2016 Creekside 23RKS
2012 Ram 2500 Laramie 4X4 Cummins 6.7L
Canada, eh?
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11-12-2015, 05:34 PM
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#5
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Senior Member
National RV Owners Club
Join Date: Jun 2010
Posts: 4,581
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I've noticed differences in pressure and temperature readings but figured it was probably caused by some tires being in the sunlight or carrying a heavier load. Hadn't considered there might be a flaw in the devices. For sure the two on the tow car drivers side run higher but I thought the motorhome diesel exhaust on the drivers side probably affected the readings.
__________________
Bob & Sandi, dogs Tasha a Frenchie and Tiki a Skipperkey
SW OREGON 2005 34 foot DolphinLX
If towing: a bright red 2016 Mini Cooper on a tow dolly.
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11-12-2015, 09:13 PM
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#6
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Senior Member
Join Date: Jul 2013
Posts: 100
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We have had the 507 for a few months. We have had two sensors go bad and I seem to be constantly checking things and moving sensors. The company is great to deal with but I am not sold on the cost vs. issues right now. I wish RV manufacturers would buy vehicles with factory units.
2016 Dynamax Force, Just Rite 2
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11-12-2015, 09:30 PM
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#7
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by halla
I wish RV manufacturers would buy vehicles with factory units.
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They did, but the manufacturer (SmarTire) quit supporting the RV market. The unit in our rig was a $2,700 option and I'm not sure people want to pay that much. I probably wouldn't if I was ordering one at that price.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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11-12-2015, 09:34 PM
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#8
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Senior Member
Join Date: Mar 2011
Posts: 754
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I too have found the sensors seem to read about 4 psi lower than my manual gauge. Definitely see a difference side to side depending on which is in the sun. Had to replace sensor batteries after about 10 months. System seems to be working fine currently.
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2014 Newmar Ventana 4037 / 4018
2015 Jeep Grand Cherokee Ltd.
1940 Chevrolet Pickup
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11-12-2015, 09:38 PM
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#9
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by britcon
I too have found the sensors seem to read about 4 psi lower than my manual gauge. Definitely see a difference side to side depending on which is in the sun. Had to replace sensor batteries after about 10 months. System seems to be working fine currently.
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How accurate is your manual gauge?
I bought a certified one at NAPA, only use it to check my other gauges.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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11-12-2015, 09:48 PM
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#10
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Senior Member
Join Date: Nov 2003
Location: Richmond Hill, GA USA
Posts: 707
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Placing a small tab of black electrical tape over the Monitor Brightness Sensor (lower left of screen) will make the internal light come on and make the monitor easier to see in daylight.
All of my tire sensors transmit within 1 or 2 psi of what my manual gauge indicates. Have you asked TST to swap out the inaccurate sensor(s)?
Fred
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Fred & Vicki
St. Augustine, Fl.
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11-13-2015, 08:06 AM
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#11
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Senior Member
Join Date: Feb 2011
Posts: 184
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My Accu-Gage inflator has a ANSI Commerical Grade B gauge (meets ANSI B40.1 Grade B specifications), which is the best quality gauge typically used for tire pressure applications; and gets checked against my Accutire Digital gauge that is accurate to plus/minus 0.5 psi. They both agree with each other at my primary RV tire inflation pressure of 95 PSI.
I plan to contact TST to see if I can get that odd-ball sensor replaced, they seem very good about that sort of thing.
Also, the placing of tape over the monitor light sensor really isn't a solution. It has been my experience that it has little effect in most normal daylight situations.
If TST comes up with a better monitor (display), I want one too. However, I am not convinced color will be any better unless it is a backlit display.
__________________
Jeffery
2003 Holiday Rambler Admiral SE W22 8.1L
Summer in Michigan, Winter in Foley, AL
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11-16-2015, 09:36 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Apr 2012
Posts: 275
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Hello,
Thank you for all your posts and comments. You will see a difference from a handheld gauge to what the sensors read. The sensors are accurate to +/- 1.5 PSI.
Smartire as someone mentioned is not accepted in the RV Industry anymore, as they had many issues and failures.
The TST monitor does have a light when it gets dark, however that light is not intended to stay lit, according to NTSB that is a distraction if the light is lit at night, and could cause the driver to take his eyes off the road. If the monitor is not Alarming then your PSI and Temp. is good. If it starts to alarm than there is an issue. Once your tires all report there is no need to watch the monitor as it will alert you there is a problem.
TST is releasing a new full color monitor, we anticipate the release to be in the 1st quarter of 2016. We will announce, and reach out to our client base prior to the release, and you will have the opportunity to pre-order.
As always please feel free to contact us at TST. We are available until midnight 7 days a week.
Thanks,
Mike Benson
770-889-9102
TST
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11-16-2015, 03:27 PM
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#13
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Senior Member
Fleetwood Owners Club
Join Date: Feb 2008
Location: California
Posts: 611
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I have been wavering on to buy/not buy. Not sure I want to deal with musical sensors, and now knowing a new monitor will be coming out I probably will keep going without them and reevaluate it at a later date, maybe the QA of the product will get better to eliminate the issues. I am sure there will be a price increase with the new monitor.
__________________
2007 Fleetwood Excursion 40E
2007 Chev Classic CC LB D/A - Toad
2013 Jeep Sahara Unlimited - Backup Toad
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11-16-2015, 03:55 PM
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#14
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Senior Member
Join Date: Aug 2011
Location: Melbourne, FL
Posts: 111
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I have been using the TST system for 3 years now with no problems other than what has been mentioned here...hard to see in the daylight - except when "bathed in sunlight", one sensor that repeatedly is 2-3 psi lower than the other three, but I just have learned that that is the way it functions. And as long as I know that this is the norm, I'm good with that. Also as mentioned prior, TST's customer service is excellent!!! Had an antenna come loose and called them up for a courteous replacement!
A couple of years ago while doing about 55mph on a back-road highway (4 lanes), had a blowout on front tire of the street side. TST system alerted me to which tire was the problem and got right off the road without any damage to my trailer at all. Changed the tire myself rather calling Good Sam service and back on the road in 30 minutes!!!
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