http://www.redorbit.com/news/techno...e-012115ive-retort-to-nfl-deflategate-012115/
These guys almost got it right!
Now this video is hilarious.
http://mmqb.si.com/2015/01/22/deflategate-video-how-nfl-officials-check-game-ball-pressure/
If you watch the video from a scientific point of view, there isn't any type of discussion to be had about ball pressure. The best the NFL can claim is that the balls are 13 psi-ish give or take a few. By their own guidelines, the balls are inflated to 13psi±0.5psi. They make no other statements. There is nothing in their rules about any other variables or the quality of the measuring devices used. You can have the balls measured at any ambient temperature or pressure you want. Did you notice how quickly the balls were tested after they cut the seal on the bag? I would assume (sorry for assuming) they do it quickly so that no questions about possession can be raised, but that leaves very little time for acclimatization. When ever a pressure devices comes in to be tested at my workplace, the first thing it does is sit on the shelf for a minimum of four hours to allow the unit to come to the same temperature and pressure as the unit being used to test it.
And something that no one seems to mention or even know about is that the instruments used to test air pressure can change as well if their environment changes, even more so if they are mechanical in nature. In my lab our temperature, humidity, pressure are constantly monitored, because even slight variations can cause our measurements to not be repeatable rendering them useless. Cause when your measuring things to 10 millionths of an inch, a half a degree temperature change is a pretty big deal. And a 20 degree swing in temperature on a mechanical pressure test is huge!
Now in the video the ref appears to be using a Tachikara Ball Gauge. They sell for $10 at Wal-Mart. They do not offer any specifics as to it's accuracy or quality. It has divisions of 0.2 psi, but that does not mean it is accurate to 0.2 psi, it only means that it's highest possible accuracy is 0.2 psi. Another draw back to this style of gauge is that it is a dial face. For a dial face to be really accurate it has to be large enough for you to see clearly, and for the accuracy required by the NFL it would so big that it would not fit in your hand and would need to have a mirrored surface to eliminate parallax error. The Tachikara has neither of those features.
If you wanted to have a gauge that was accurate enough to measure the required pressure for the NFL, you would need something like this; they start around $500
http://www.coleparmer.ca/Product/Digital_Industrial_Gauge_30_psi_Battery_Powered/RK-68338-06
Now this wall of text has been spurted for two reasons;
one it's fun to talk about work related things for a change on Halforums,
two if the NFL does anything other than make this go away and say that there was no harm no foul and that changes will be made going forward, Tom Brady could easily sue their pants off for damaging his brand by being labelled a cheat when there is no actually way to prove that he did
TLDR: the uncertainty of the gauges used to measure the pressure in NFL footballs is so great that you can't actually measure the pressure in NFL footballs