Why choose an o2 concentrator? Substantial savings on o2 costs. Reduce reliance on third party o2 suppliers. Eliminates H&S red tape and risk by reducing the requirement for o2 cylinders.VETS Oxygen Concentrator 5 LitreContact Us to PurchaseSpecifications Multi parameter display, including percentage concentration.Large LCD Screen5 and 10 Litre models Quietest operation of all concentrators available in this class.93% +/- 3% output.Low pressure, low oxygen and power failure alarms as standard.Tripple air filtration including carbon and bacterial filtration.3 year guarantee subject to servicing.