Compression Tester Fail?

[046]

you test it again a known to be accurate high grade gauge... like a Snap-on or Drager.
which should agree with each other to check your calibration standards.

Snap-on compression gauge sets come with several adapters with valve on tip.

German Drager guages are considered one of the best

How do you test your gauge to make sure it is accurate?

 

[Moss Man]

I converted the Lisle to a quick disconnect with a air coupler, I will be hooking it to the compressor soon to see where I stand. Considering how cheap the schrader is for this one, I will be getting one tomorrow.

 

[mdavlee]

My new gauge already has the shrader valve leaking. I can blow through it backwards. It has no tension at all.

 

[Moss Man]

I finally tested the gauge today against the gauges on my air compressor and it is reading 30 lbs low at 60 lbs, 90 lbs and 120 lbs. I guess it's time to get a new gauge. I tested the cheaper gauge that my friend let me borrow and it is only 5 lbs low which would be acceptable.

Any suggestions on a gauge and a place to buy it?