Development of gas sensor measuring techniques and modelling of the sensing behaviour
The characterisation of conduction is important for the design of gas instrumentation. Semiconducting gas sensors lack stability, sensitivity and selectivity due to many reasons. Methods of characterisation have to be developed for quantitative and reliable gas detection. The conduction model based...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2008
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| Online Access: | http://hdl.handle.net/10356/13277 |
| _version_ | 1826118225995235328 |
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| author | Koh, Boon Chin. |
| author2 | Birlasekaran, Sivaswamy |
| author_facet | Birlasekaran, Sivaswamy Koh, Boon Chin. |
| author_sort | Koh, Boon Chin. |
| collection | NTU |
| description | The characterisation of conduction is important for the design of gas instrumentation. Semiconducting gas sensors lack stability, sensitivity and selectivity due to many reasons. Methods of characterisation have to be developed for quantitative and reliable gas detection. The conduction model based on Schottky potential barrier at grain boundary is the widely accepted mechanism. For commercial applications, the conductance change is related to target gas concentration either by exponential or square root law. For a practical usage, other parameters affecting the conductance are ambient temperature and relative humidity variation, non-ohmic characteristics of the sensing surface, gas adsorption and desorption characteristics at various surface temperatures and earlier history. |
| first_indexed | 2024-10-01T04:40:13Z |
| format | Thesis |
| id | ntu-10356/13277 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:40:13Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/132772023-07-04T15:51:43Z Development of gas sensor measuring techniques and modelling of the sensing behaviour Koh, Boon Chin. Birlasekaran, Sivaswamy School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing The characterisation of conduction is important for the design of gas instrumentation. Semiconducting gas sensors lack stability, sensitivity and selectivity due to many reasons. Methods of characterisation have to be developed for quantitative and reliable gas detection. The conduction model based on Schottky potential barrier at grain boundary is the widely accepted mechanism. For commercial applications, the conductance change is related to target gas concentration either by exponential or square root law. For a practical usage, other parameters affecting the conductance are ambient temperature and relative humidity variation, non-ohmic characteristics of the sensing surface, gas adsorption and desorption characteristics at various surface temperatures and earlier history. Master of Engineering 2008-08-25T09:01:28Z 2008-10-20T07:22:45Z 2008-08-25T09:01:28Z 2008-10-20T07:22:45Z 1998 1998 Thesis http://hdl.handle.net/10356/13277 en 143 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing Koh, Boon Chin. Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title | Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title_full | Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title_fullStr | Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title_full_unstemmed | Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title_short | Development of gas sensor measuring techniques and modelling of the sensing behaviour |
| title_sort | development of gas sensor measuring techniques and modelling of the sensing behaviour |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing |
| url | http://hdl.handle.net/10356/13277 |
| work_keys_str_mv | AT kohboonchin developmentofgassensormeasuringtechniquesandmodellingofthesensingbehaviour |