The Perfecto2 by Invacare is the smallest, lightest, and most energy efficient 5-liter concentrator produced by Invacare. Packaged in a contemporary, patient-preferred design, the high-performance Perfecto2 unit incorporates all of the best features of the market-leading Platinum XL concentrator, while significantly improving upon the key specifications of the Platinum XL. Also available without the SensO2 oxygen sensor (IRC5P), the Perfecto2 concentrator represents a quantum leap forward in the evolution of oxygen concentrators.