The only accurate manometer! I had a hard time filling the tires with another gauge because the car's onboard tire gauge read 40psi and my other gauge read 36psi. I then tried this Accu-Gage and it matched the auto sensor exactly at 40 PSI. I tried 5 other gauges I had in my car glove box and they were all over the place - 44psi, 36psi, just incredibly wide. Accu-Gage was the only accurate one, so I threw all the others in the trash. However, next time I would buy one without a tube. You must press the tire valve to take a measurement. It's easier to squeeze the metal case of the dial (standard model) than the small tube (this model). If I use this hose model, air will most likely leak out as I may not be putting enough pressure on it. This tube model is primarily for tires with hard-to-reach valves, but in most cases a right-angle tube is more convenient.
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