Assessment of a storage system to deliver uninterrupted therapeutic oxygen during power outages in resource-limited settings - Fig 1

(A) Low-Pressure Reservoir system used in this study. (B) Low-Pressure Reservoir system is comprised of a reservoir and flow loop (1-check valve, 2-pressure sensor, 3-flow control orifice, 4-electrical solenoid, 5-reservoir, 6-flow meter, 7-temperature and humidity sensors, 8-power monitor, 9-surge protection) to store excess oxygen from the high pressure side of a concentrator. The sensors are added for monitoring purposes.