Farkles, Gear & Accessories > Farkles and Gear General Section

Tyre Gauges - Whats good.

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Brock:
There is always a question about whether a gauge is accurate or not.  Most tyre gauges are made with a tolerance of +/- 3% of full scale deflection. IE a gauge that has a max reading of 160PSI, can be out as much as +/- 4.8 PSI. The olny way to be sure of your gauge is to have it tested against a Master gauge. (can be expensive)

On the weekend I bought a Motoreyes Digital Pro electronic gauge at Autopro, stated accuracy is +/- 2%. Today I received it back from the Company Cal lab (free cal check). The photo shows the gauge and the test results, very surprising they are, and are good enough for me..
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Turtle:
I have the same type mine is a Slime brand works well I got mine awhile ago from repco about $20

Turtle

Biggles:
That's amazing accuracy!  Only 0.5% or less pretty consistently in the range we use.
Just don't drop it!!

Might be interesting to send it back to your mate after a year's use to see how it stands up.

HunterTodd:
I agree with you Biggles, under our QA we have to have our pressure gauges calibrated with a  manometer every 6 months. It is amazing how much they drift. We have taken to throwing the gauges out after six months and buying new calibrated ones.

But what do you do?  Even 3% error is better than a wet finger in the air.

Brock:
The discussion I had many times at work with the numpties on the hangar floor was some thing like  "this gauge is out!!" Me, "How did you arrive at that conclusion??". Numpty " Its 5 PSI higher than that gauge".... "Hmmm, maybe its correct, and the other gauge is out, or they could both be within tolerance..". Numpty  "????? How can that be??  "  .....  "Well, they are both allowed to be 4.8 PSI either side of the true reading, so one could be a little high, and the other a little low. So really, they are both OK. Bring them to the shop and I can test them. "

Numpty turns up at the Cal lab a week later with a gauge still in the packet  " Can you test this??".... Sure, where are the other 2?? ".  N "I threw them out cos I couldnt trust them and got a new one." After a quick test on the .1% standard gauge.. " Well there you are, this gauge is good, its 2PSI low over the range, good to go. Here is the cal sticker and the certificate will be on file". N  " but its out!!??!! "   .... :|||| :|||| :||||  "No, its in tolerance take it and go away"

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