How many pulse flow settings does the Inogen One G5 accommodate? You are here: Main Portable Concentrator FAQs Inogen One G5 Inogen One G5 FAQs How many pulse flow settings does the Inogen One G5 accommodate? < All Topics The Inogen One G5 has six settings, from 1 to 6. 1 being the lowest and 6 being the highest.