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I've got one of the digital gauges that reads the pressure to the nearest 1/2 pound. It gives consistent readings, I've never checked it against a calibrated gauge, but does seem to be much more accurate and consistent than any of the pen type gauges I've used. Sorry I can't remember what brand it is, but remember it was a brand that I trusted. I think I paid about $8. for it. Many of the pen type gauges I've tried will give me one reading one time then without adjusting the pressure get a completely different reading (sometimes several psi) 10 seconds later.
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