Envolv announces the product launch of Aperta Series Oxygen Concentrator based on Pressure Swing Absorption (PSA) technology that utilizes unique molecular sieves to separate air into its constituent parts of Nitrogen, Oxygen and trace gases. It comes with 10LM & 5LM version. The 10 litres two outlet allows it to be used by 2 patients with oxygen purity of ≥93±3% across all flow rates.