Development of a Oxygen Sensor for Marine ... - DTU Nanotech
Development of a Oxygen Sensor for Marine ... - DTU Nanotech
Development of a Oxygen Sensor for Marine ... - DTU Nanotech
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Contents<br />
1 Introduction 1<br />
1.1 Dissolved <strong>Oxygen</strong> Level . . . . . . . . . . . . . . . . . . . . . 2<br />
1.2 Thesis Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />
2 Optodes and ISFET 7<br />
2.1 Optodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />
2.2 ISFET (Ion Selective Field Effect Transistor) . . . . . . . . . . 9<br />
2.3 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11<br />
3 Theory <strong>of</strong> the Clark <strong>Sensor</strong> 13<br />
3.1 Chemistry <strong>of</strong> the Clark <strong>Sensor</strong> . . . . . . . . . . . . . . . . . . 14<br />
3.1.1 One layer electrode model . . . . . . . . . . . . . . . . 16<br />
3.1.2 Two layer model . . . . . . . . . . . . . . . . . . . . . 19<br />
3.2 The Potentiostat . . . . . . . . . . . . . . . . . . . . . . . . . 22<br />
3.3 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26<br />
4 System Design 27<br />
4.1 General Design . . . . . . . . . . . . . . . . . . . . . . . . . . 27<br />
4.2 Actual Design . . . . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
4.2.1 Minor Design Variations . . . . . . . . . . . . . . . . . 32<br />
4.3 Temperature <strong>Sensor</strong> . . . . . . . . . . . . . . . . . . . . . . . . 33<br />
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