Part 4/8:
An essential feature of any vacuum system is the pressure gauge, and Hank has made thoughtful choices regarding its placement. He has positioned the vacuum gauge externally to minimize the risk of contamination, thus ensuring accurate readings. However, he notes a limitation: the gauge is only effective with air, as it fails to register pressure changes when hydrogen is introduced. This nuance is critical for Hank as he seeks to understand how to navigate varying gas types during his experiments.