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Engineers are often faced with oxygen concentrators of unknown quality. This device should allow the engineer to quickly determine if the device is producing concentrated oxygen (perhaps greater than 80% or 90%) without using electricity (batteries, etc). An ideal device would allow a crude (within 20%) estimate of the oxygen concentration. The designer can assume access to elements often found in hospitals (CO2 absorbing material, matches etc).

Past work

A team has designed a system based on the burning time of match, coke bottles and a lump of clay. However, the system is a bit hard to read and needs to be calibrated for every size of coke bottle. Is there a way to calibrate the device based on the volume of the coke bottle? Can it be made easier to read?


if interested, contact Syrone Liu, (syrone.liu at duke.edu)