Contrary to most of the above, I use a cheap 'pen style" gauge but I find it to be consistent which I think is most important. Comparing one gauge to another will almost always lead to variances. Even if one is off by a couple percent but you know what that it and it's consistent, your pressures will be consistent too.
Another route to go would be a expensive racing gauge such as a longacre.
My $.02
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2013 Passport 3220BHWE, upgrade axles, Kumho Radial 857's, all LED, TST507 TPMS, Reese DCSC, DIY corner stabilizers
2012 Ram 1500 Sport crew cab, Hemi, 4x4, 3.92 LSD, factory brake controller, S&B CAI w/scoop, Moroso air/oil can, 87mm ported/polished/knife-edged throttle body, Magnaflow exhaust, 180* t-stat, Rear lowered 2", Airlift 1000.
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