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The suit's pressure indicator, located on the suit's left arm.

The pressure gauge indicates that it measures "Suit Pressure" in "PSIA" (pounds per square inch, absolute, meaning the pressure relative to a vacuum; what most people mean by "PSI" is actually "pounds per square inch, gauge", meaning the pressure relative to regular atmospheric pressure).

The gauge measures between 3.0 and 6 PSIA, with the needle reading off-scale high. This make sense, since it measures the absolute pressure and normal atmospheric pressure is approximately 14.7 PSI.