Independent Living Specialists off a wide range of both floor standing and portable oxygen concentrators. Portable Oxygen Concentrators allow you to be on-the-go doing those everyday tasks that you would normally do while enjoying your freedom and the ability to be independent. The best one suited to you will depend on your oxygen needs, lifestyle and environment. ILS carries oxygen concentrators from 4 select brands including Airsep, Inogen, Respironics and Phillips Respironics. These brands were chosen after careful consideration because of their unbeatable reputation for consistently providing products that are sturdy, reliable and of the highest quality.