Over the last decade the number of companies have produced portable oxygen concentrators have skyrocketed. Around 2000, there were only about 3 portable concentrators from 2 different manufacturers. Since then, that number has jumped to over 20 different portable units from 8 different makers. Here is a list of current portable oxygen concentrator makes and models. All of these models are FAA approved.

RESPIRONICS
Respironics EverGo
Respironics SimplyGo

INOGEN
Inogen One
Inogen One G2
Inogen One G3

SEQUAL
SeQual Eclipse 3
SeQual Eclipse 5
SeQual Eqionox
SeQual Saros

AIRSEP
AirSep FreeStyle
AirSep LifeStyle
AirSep Focus
AirSep Freestyle 5

DEVILBISS
DeVilbiss iGO

INVACARE
Invacare XPO2
Invacare Solo 2

INOVA LABS
Inova Labs LifeChoice Activox
LifeChoice / lnova Labs LifeChoice

OXLIFE
Oxylife Independence

PRECISION MEDICAL
Precision Medical EasyPulse

VBOX
VBox Trooper