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Old 12-27-2015, 09:01 AM   #15
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Originally Posted by wingnut60 View Post
Curious as to how you know your digital gauge is accurate within +/- .5 psi?
Hey Joe

If you read the documentation that accompanies the device you will find a specifications listing. Accuracy is +/- 1% + .5 psi in .5 psi increments. My bad, should have qualified my statement better. For an RV tire of 100 psi, your looking at +/- 1.5 psi.

Also, you can get a good indicator of your gauges accuracy by visiting a Discount Tire Center where they have a digitally controlled airing system. These systems, I have been told, are calibrated regularly. You can then check your device against a known tire inflation pressure.

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Old 12-27-2015, 10:23 AM   #16
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Thanks. I just am used to having multiple gauges that don't correlate between them at any given time.
What is the brand/model/psi range of the gauge you use?
And thanks for the tip on Discount Tire--as many times as I have been to a tire store, have never given it a thought as to how accurate THEIR guages are...
I have 19.5 truck tires and 17.5 trailer tires--basically, I check them with a quality truck gauge, then use the TST to tell me how the pressures are trending, and everything I check is above 80psi.

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tire pressure

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