The Nidek Nuvo Lite 925 5 liter/minute oxygen concentrator has a lockable flow control valve. In this way, the oxygen level given to the patient can be fixed and does not allow unauthorized change. There is a metal apparatus at the oxygen outlet on the device. In this way, it has been made more durable than plastics. Resettable circuit breaker. The operating system features time cycle/rapid pressure rise, overcurrent or mains surge protection, thermal switch, 40 psig pressure relief valve, filters cabinet and compressor inlet. The device gives a warning in case of high pressure/low pressure, low o2 concentration (oms model).