Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface
A conceptually improved sensor network to monitor the partial pressure of CO2 in different soil horizons was designed. Consisting of five membrane-based linear sensors (line-sensors) each with 10 m length, the set-up enables us to integrate over the locally fluctuating CO2 concentrations (typically...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2012-12-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/12/12/17058 |
| _version_ | 1811278557479960576 |
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| author | Detlef Lazik Sebastian Ebert |
| author_facet | Detlef Lazik Sebastian Ebert |
| author_sort | Detlef Lazik |
| collection | DOAJ |
| description | A conceptually improved sensor network to monitor the partial pressure of CO2 in different soil horizons was designed. Consisting of five membrane-based linear sensors (line-sensors) each with 10 m length, the set-up enables us to integrate over the locally fluctuating CO2 concentrations (typically lower 5%vol) up to the meter-scale gaining valuable concentration means with a repetition time of about 1 min. Preparatory tests in the laboratory resulted in a unexpected highly increased accuracy of better than 0.03%vol with respect to the previously published 0.08%vol. Thereby, the statistical uncertainties (standard deviations) of the line-sensors and the reference sensor (nondispersive infrared CO2-sensor) were close to each other. Whereas the uncertainty of the reference increases with the measurement value, the line-sensors show an inverse uncertainty trend resulting in a comparatively enhanced accuracy for concentrations >1%vol. Furthermore, a method for in situ maintenance was developed, enabling a proof of sensor quality and its effective calibration without demounting the line-sensors from the soil which would disturb the established structures and ongoing processes. |
| first_indexed | 2024-04-13T00:37:58Z |
| format | Article |
| id | doaj.art-9b72ee258795478ea2b6413439310cfa |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T00:37:58Z |
| publishDate | 2012-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9b72ee258795478ea2b6413439310cfa2022-12-22T03:10:17ZengMDPI AGSensors1424-82202012-12-011212170581707310.3390/s121217058Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the SubsurfaceDetlef LazikSebastian EbertA conceptually improved sensor network to monitor the partial pressure of CO2 in different soil horizons was designed. Consisting of five membrane-based linear sensors (line-sensors) each with 10 m length, the set-up enables us to integrate over the locally fluctuating CO2 concentrations (typically lower 5%vol) up to the meter-scale gaining valuable concentration means with a repetition time of about 1 min. Preparatory tests in the laboratory resulted in a unexpected highly increased accuracy of better than 0.03%vol with respect to the previously published 0.08%vol. Thereby, the statistical uncertainties (standard deviations) of the line-sensors and the reference sensor (nondispersive infrared CO2-sensor) were close to each other. Whereas the uncertainty of the reference increases with the measurement value, the line-sensors show an inverse uncertainty trend resulting in a comparatively enhanced accuracy for concentrations >1%vol. Furthermore, a method for in situ maintenance was developed, enabling a proof of sensor quality and its effective calibration without demounting the line-sensors from the soil which would disturb the established structures and ongoing processes.http://www.mdpi.com/1424-8220/12/12/17058gasmonitoringsoilgreenhouse gasesCO2membranesensor |
| spellingShingle | Detlef Lazik Sebastian Ebert Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface Sensors gas monitoring soil greenhouse gases CO2 membrane sensor |
| title | Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface |
| title_full | Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface |
| title_fullStr | Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface |
| title_full_unstemmed | Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface |
| title_short | Improved Membrane-Based Sensor Network for Reliable Gas Monitoring in the Subsurface |
| title_sort | improved membrane based sensor network for reliable gas monitoring in the subsurface |
| topic | gas monitoring soil greenhouse gases CO2 membrane sensor |
| url | http://www.mdpi.com/1424-8220/12/12/17058 |
| work_keys_str_mv | AT detleflazik improvedmembranebasedsensornetworkforreliablegasmonitoringinthesubsurface AT sebastianebert improvedmembranebasedsensornetworkforreliablegasmonitoringinthesubsurface |