I've had good luck with these:
You don't know for sure how accurate a gauge is unless you compare it to
a lab standard, but repeatability is a good sign, and these always do.
FWIW, they agree with the TPS monitor in my Mustang.
On 5/29/2022 10:11 AM, Jeff Scarbrough wrote:
> A couple of tire pressure gauge questions:
> I got tired of cheap Horrible Freight tire inflators, so I sprung for
> a brace of Milton S-506 inflators, thinking of they were good enough
> for the gas station of my youth, they ought to be ok now.Â One in the
> garage, one in the shop...they don't see a ton of use.Â Last week, I
> was filling bicycle tires in the garage with the hotdog compressor,
> and couldn't get the air up sufficiently in the tire.Â Finally went to
> get another gauge...my electronic gauge quit, and my 50 years old
> Bridgeport Brass gauge needs rebuilding, so I grabbed the.othwr Milton
> inflator.Â Turns out, I had missed blowing up the bicycle tires only
> by a miracle of Chinese rubber.Â One inflator reads 50 psi while the
> other one reads 90.
> So, like when two inmates at the asylum both claim to be Napoleon, at
> least one of them is lying. And at least one will need repairing.
> So, two questions:.
> 1.Â Any suggestions for a good reliable electronic or analog pressure
> gauge to verify/calibrate the inflators?Â (I also need one to put in
> my daughter's car, so gloveboxability is a plus).
> 2.Â Anyone ever repair a Milton (or Bridgeport) tire gauge?Â Any
> suggestions?Â The Milton's aren't very old, especially in terms of
> what we old guys expect from our expensive American made tools.
> Bonus question:. How might one calibrate a pressure gauge against a
> primary source?Â I'm thinking of a water column or something, but 35
> psi is approximately 80 feet of water.Â I'm finding that impractical
> for home use.
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