Profile: Oxygen Concentrator Depot specializes in home and portable oxygen concentrators. We provide Respironics Evergo, DeVilbiss IGo, Inogen One, SeQual Eclipse 3, Evo Central Air, and Invacare XPO2 portable oxygen concentrators. Our DeVilbiss Igo is the travel oxygen machine for both day and night use. Most oxygen therapy patients use pulse flow during the day, and switch over to continuous flow when they go to sleep. This can be avoided by using our DeVilbiss Igo.