1.  Oxygen Analyzer Jay Patel #19 April 27, 2011

2.  Senior Design Project [1]

3. Overview  Introduction  Current Methods  Open Flame  Zinc-Air Battery  Car Oxygen Sensor  New Approach  Device Schematic  Ethics  Conclusion [2]

4. Introduction  Engineering World Health (EWH)  Oxygen Concentrators  Current Method to Test Oxygen Concentration  Open Flame Method [5] [4] [3]

5. Open Flame Method [6]

6.  Zinc-air Battery Oxygen Sensor  Pros  Relatively inexpensive components  Total cost less then $10  Easily assembled  Cons  Battery Replacement every 200hrs  Temperature dependent  Accurate up to 80% O2 concentration Current Sensors [7]

7. Current Sensors Continued…  Car O2 Sensor  Pros  Mechanical strength  Resistance to wear and corrosion  Cons  Replaced every 12-24 months  Expensive over time  Loss of Calibration [8]

8. New Approach  Colorimetric Oxygen Sensor  Pros:  Cheap  Easy to use  Easy to run  Accurate  Does not require re-calibration  Small/Portable  Cons:  The polymer needs to be replaced  Degradation of the polymer affects the readout [9]

9. Fluorescence Quenching [10]

10. Schematic GREEN LED POLYMER INTENSITY METER LED SCREEN MIRROR OUTER CASING INNER HOUSING [11]

11. Ethics  Degrades  Disposable Part  Expensive Over Time  Toxic Waste  Singlet Oxygen Released  Inefficient Stabilizer  Further Research [12]

12. Conclusion  Promising and Challenging Approach  Further Development is Required [13]

13. Thank You

14. Index of Illustrations  [1] BME 180 Senior Design Team 7  [2] http://www.quintex.info/home/images/Overview.JPG  [3] http://upload.ecvv.com/upload/Product/200801/200691490339536694_Portable_Oxygen_Concentrator.jpg  [4] http://www.jeffgordonchildrensfoundation.org/atf/cf/%7B6CE8BB8A-70EF-46A9-B74F- B24271B2E94C%7D/thumbcache/incubators%20arrive%20Wete%20Hospital%20Pemba%20copy_thumb_400.jpg  [5] http://www.inmed.us/training_sites/mseleni_hospital_south_africa.asp  [6] http://www.oldschool.com.sg/modpub/184614409647a4b14071656  [7] http://chem.sci.utsunomiya-u.ac.jp/cejrnlE.html  [8] http://www.bobblick.com/techref/projects/o2sensor/o2sensor.html  [9] http://linkinghub.elsevier.com/retrieve/pii/S0925400511000037  [10] http://linkinghub.elsevier.com/retrieve/pii/S0925400511000037  [11] BME 180 Senior Design Team 7  [12] http://www.hobotraveler.com/labels/Water.html  [13] http://almacog.org/reach-out/mission-to-sierra-leone-west-africa