Oxygen Analyzer

Jay Patel #19April 27, 2011

Senior Design Project

[1]

Overview Introduction Current Methods

Open Flame Zinc-Air Battery Car Oxygen Sensor

New Approach Device

Schematic Ethics Conclusion

[2]

Introduction Engineering World

Health (EWH)

Oxygen Concentrators

Current Method to Test

Oxygen Concentration

Open Flame Method

[5]

[4]

[3]

Open Flame Method

[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]

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]

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]

Fluorescence Quenching

[10]

Schematic

GREEN LED

POLYMER

INTENSITY METER

LED SCREENMIRRO

R OUTER CASING

INNER HOUSING[11]

Ethics

Degrades Disposable Part Expensive Over Time Toxic Waste

Singlet Oxygen Released Inefficient Stabilizer Further Research

[12]

Conclusion

Promising and Challenging Approach Further Development is Required

[13]

Thank You

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