SALE ENDS TODAY!!! ORDER TODAY AND RECEIVE A FREE $100 PULSE OXIMETER OR TUBING KIT!!! BRAND NEW WITH FULL 3 YEAR WARRANTY!!! The Perfecto2 V oxygen concentrator is an economical addition to the premier Invacare stationary concentrator line. This 5-liter unit is small, quiet and lightweight and comes standard with the SensO2 oxygen sensor. The Perfecto2 V incorporates many of the best features of the market-leading Perfecto2 concentrator, including its contemporary, patient-preferred external design and color.