Evaluation and Recommendations for Improving the Accuracy of an Inexpensive Water Temperature Logger

Handle URI:
http://hdl.handle.net/10754/598243
Title:
Evaluation and Recommendations for Improving the Accuracy of an Inexpensive Water Temperature Logger
Authors:
Lentz, S. J.; Churchill, J. H.; Marquette, C.; Smith, J.
Abstract:
Onset's HOBO U22 Water Temp Pros are small, reliable, relatively inexpensive, self-contained temperature loggers that are widely used in studies of oceans, lakes, and streams. An in-house temperature bath calibration of 158 Temp Pros indicated root-mean-square (RMS) errors ranging from 0.01° to 0.14°C, with one value of 0.23°C, consistent with the factory specifications. Application of a quadratic calibration correction substantially reduced the RMS error to less than 0.009°C in all cases. The primary correction was a bias error typically between -0.1° and 0.15°C. Comparison of water temperature measurements from Temp Pros and more accurate temperature loggers during two oceanographic studies indicates that calibrated Temp Pros have an RMSerror of~0.02°C throughout the water column at night and beneath the surface layer influenced by penetrating solar radiation during the day. Larger RMS errors (up to 0.08°C) are observed near the surface during the day due to solar heating of the black Temp Pro housing. Errors due to solar heating are significantly reduced by wrapping the housing with white electrical tape. © 2013 American Meteorological Society.
Citation:
Lentz SJ, Churchill JH, Marquette C, Smith J (2013) Evaluation and Recommendations for Improving the Accuracy of an Inexpensive Water Temperature Logger. Journal of Atmospheric and Oceanic Technology 30: 1576–1582. Available: http://dx.doi.org/10.1175/JTECH-D-12-00204.1.
Publisher:
American Meteorological Society
Journal:
Journal of Atmospheric and Oceanic Technology
KAUST Grant Number:
USA 00002; KSA 00011
Issue Date:
Jul-2013
DOI:
10.1175/JTECH-D-12-00204.1
Type:
Article
ISSN:
0739-0572; 1520-0426
Sponsors:
This work is based on research supported by Awards USA 00002 and KSA 00011 made by King Abdullah University of Science and Technology (KAUST) and by the Ocean Sciences Division of the National Science Foundation under Grant OCE-0548961. The authors appreciate helpful comments and suggestions from Anthony Kirincich and three anonymous reviewers.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLentz, S. J.en
dc.contributor.authorChurchill, J. H.en
dc.contributor.authorMarquette, C.en
dc.contributor.authorSmith, J.en
dc.date.accessioned2016-02-25T13:17:16Zen
dc.date.available2016-02-25T13:17:16Zen
dc.date.issued2013-07en
dc.identifier.citationLentz SJ, Churchill JH, Marquette C, Smith J (2013) Evaluation and Recommendations for Improving the Accuracy of an Inexpensive Water Temperature Logger. Journal of Atmospheric and Oceanic Technology 30: 1576–1582. Available: http://dx.doi.org/10.1175/JTECH-D-12-00204.1.en
dc.identifier.issn0739-0572en
dc.identifier.issn1520-0426en
dc.identifier.doi10.1175/JTECH-D-12-00204.1en
dc.identifier.urihttp://hdl.handle.net/10754/598243en
dc.description.abstractOnset's HOBO U22 Water Temp Pros are small, reliable, relatively inexpensive, self-contained temperature loggers that are widely used in studies of oceans, lakes, and streams. An in-house temperature bath calibration of 158 Temp Pros indicated root-mean-square (RMS) errors ranging from 0.01° to 0.14°C, with one value of 0.23°C, consistent with the factory specifications. Application of a quadratic calibration correction substantially reduced the RMS error to less than 0.009°C in all cases. The primary correction was a bias error typically between -0.1° and 0.15°C. Comparison of water temperature measurements from Temp Pros and more accurate temperature loggers during two oceanographic studies indicates that calibrated Temp Pros have an RMSerror of~0.02°C throughout the water column at night and beneath the surface layer influenced by penetrating solar radiation during the day. Larger RMS errors (up to 0.08°C) are observed near the surface during the day due to solar heating of the black Temp Pro housing. Errors due to solar heating are significantly reduced by wrapping the housing with white electrical tape. © 2013 American Meteorological Society.en
dc.description.sponsorshipThis work is based on research supported by Awards USA 00002 and KSA 00011 made by King Abdullah University of Science and Technology (KAUST) and by the Ocean Sciences Division of the National Science Foundation under Grant OCE-0548961. The authors appreciate helpful comments and suggestions from Anthony Kirincich and three anonymous reviewers.en
dc.publisherAmerican Meteorological Societyen
dc.titleEvaluation and Recommendations for Improving the Accuracy of an Inexpensive Water Temperature Loggeren
dc.typeArticleen
dc.identifier.journalJournal of Atmospheric and Oceanic Technologyen
dc.contributor.institutionWoods Hole Oceanographic Institution, Woods Hole, United Statesen
kaust.grant.numberUSA 00002en
kaust.grant.numberKSA 00011en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.