How many pulse flow settings does the Inogen One G3 accommodate? You are here: Main Portable Concentrator FAQs Inogen One G3 Inogen One G3 FAQs How many pulse flow settings does the Inogen One G3 accommodate? < All Topics The original Inogen One G3 provided four settings, from 1 to 4. Beginning in 2018, this model was updated to provide setting 5 as well.