Stabilizing, monitoring air helps ensure part measurement accuracy
As children, we likely all learned the hard way that drastic temperature changes cause objects to change size—whether it was leaving a soda in the freezer too long to get it cold or breaking your turtle's terrarium by cleaning it with hot water after it had been resting on the cold ground (sorry, Mom and Dad!). However, in the realm of precision measurement, even minute differences in atmospheric conditions can have huge impacts—to the point that parts manufactured within spec can fail inspection and be needlessly reworked or even scrapped.