Best practices for autonomous measurement of seawater pH with the Honeywell Durafet.
Performance of autonomous pH sensors is evaluated by comparing in situ data to independent bench-top measurements of pH and to co-located pH, O2, and pCO2 sensors. While the best practice is always to deploy a properly calibrated sensor, the lengthy time period required for sensor conditioning and c...
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ftdatacite:10.25607/obp-18 2023-05-15T17:51:24+02:00 Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. Bresnahan Jr., Philip J. Martz, Todd R. Takeshita, Yuichiroa Johnson, Kenneth S 2014 pp.44-60 https://dx.doi.org/10.25607/obp-18 https://www.oceanbestpractices.net/handle/11329/432 en eng UNESCO/IOC Attribution-NonCommercial-ShareAlike 3.0 IGO http://creativecommons.org/licenses/by-nc-sa/3.0/igo/ CC-BY-NC-SA pH Ocean acidification ISFET Autonomous sensors Calibration Parameter DisciplineChemical oceanography Instrument Type VocabularypH sensors Other CreativeWork article Journal Contribution 2014 ftdatacite https://doi.org/10.25607/obp-18 2021-11-05T12:55:41Z Performance of autonomous pH sensors is evaluated by comparing in situ data to independent bench-top measurements of pH and to co-located pH, O2, and pCO2 sensors. While the best practice is always to deploy a properly calibrated sensor, the lengthy time period required for sensor conditioning and calibration often results in sensor deployment without comprehensive calibration. Quality control (QC) procedures are examined to determine the errors associated with different in situ calibration approaches and lay a framework for best practices. Sensor packages employing the Honeywell Durafet remained stable across multiple deployments for over nine months. However, sensor performance was often limited by biofouling. Regional empirical relationships for estimating carbonate system parameters are shown to enable identification of otherwise indistinguishable sensor offset and drift when multiple sensor types are co-located. Uncertainty is determined by calibration approach and must be quantified on a case-by-case basis. Our results indicate that the Durafet is capable of accuracy, relative to a chosen reference, of better than 0.03 pH units over multiple months. Accuracy is improved when a robust shore-side calibration is performed, an independent means of QC is available throughout a deployment, and effective biofouling prevention measures are taken. Article in Journal/Newspaper Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
pH Ocean acidification ISFET Autonomous sensors Calibration Parameter DisciplineChemical oceanography Instrument Type VocabularypH sensors |
spellingShingle |
pH Ocean acidification ISFET Autonomous sensors Calibration Parameter DisciplineChemical oceanography Instrument Type VocabularypH sensors Bresnahan Jr., Philip J. Martz, Todd R. Takeshita, Yuichiroa Johnson, Kenneth S Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
topic_facet |
pH Ocean acidification ISFET Autonomous sensors Calibration Parameter DisciplineChemical oceanography Instrument Type VocabularypH sensors |
description |
Performance of autonomous pH sensors is evaluated by comparing in situ data to independent bench-top measurements of pH and to co-located pH, O2, and pCO2 sensors. While the best practice is always to deploy a properly calibrated sensor, the lengthy time period required for sensor conditioning and calibration often results in sensor deployment without comprehensive calibration. Quality control (QC) procedures are examined to determine the errors associated with different in situ calibration approaches and lay a framework for best practices. Sensor packages employing the Honeywell Durafet remained stable across multiple deployments for over nine months. However, sensor performance was often limited by biofouling. Regional empirical relationships for estimating carbonate system parameters are shown to enable identification of otherwise indistinguishable sensor offset and drift when multiple sensor types are co-located. Uncertainty is determined by calibration approach and must be quantified on a case-by-case basis. Our results indicate that the Durafet is capable of accuracy, relative to a chosen reference, of better than 0.03 pH units over multiple months. Accuracy is improved when a robust shore-side calibration is performed, an independent means of QC is available throughout a deployment, and effective biofouling prevention measures are taken. |
format |
Article in Journal/Newspaper |
author |
Bresnahan Jr., Philip J. Martz, Todd R. Takeshita, Yuichiroa Johnson, Kenneth S |
author_facet |
Bresnahan Jr., Philip J. Martz, Todd R. Takeshita, Yuichiroa Johnson, Kenneth S |
author_sort |
Bresnahan Jr., Philip J. |
title |
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
title_short |
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
title_full |
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
title_fullStr |
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
title_full_unstemmed |
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. |
title_sort |
best practices for autonomous measurement of seawater ph with the honeywell durafet. |
publisher |
UNESCO/IOC |
publishDate |
2014 |
url |
https://dx.doi.org/10.25607/obp-18 https://www.oceanbestpractices.net/handle/11329/432 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_rights |
Attribution-NonCommercial-ShareAlike 3.0 IGO http://creativecommons.org/licenses/by-nc-sa/3.0/igo/ |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.25607/obp-18 |
_version_ |
1766158528492339200 |