Response Characteristics of Two Oxygen Sensors for Oceanic CTDs

F. I. M. Thomas Hawaii Institute of Marine Biology, SOEST, University of Hawaii at Manoa, Kaneohe, Hawaii

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S. A. McCarthy Oceanography Department, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii

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J. Bower Oceanography Department, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii

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S. Krothapalli Oceanography Department, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii

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M. J. Atkinson Oceanography Department, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii

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P. Flament Oceanography Department, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii

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Abstract

Response characteristics of a microhole potentiostatic oxygen sensor and a Beckman membrane oxygen sensor were measured in a laboratory over temperatures ranging from 1° to 21°C. The response term τ of the microhole sensor changed 1.7-fold over this temperature range, and τ of the membrane sensor changed 1.6-fold. For the microhole sensor, the effect of temperature on τ can be modeled as lnτ+−6.5 + 1618T−1. For the membrane sensor the temperature effect on τ can be modeled as lnτ = −5.8 + 2116T−1, where T is temperature in kelvins.

Abstract

Response characteristics of a microhole potentiostatic oxygen sensor and a Beckman membrane oxygen sensor were measured in a laboratory over temperatures ranging from 1° to 21°C. The response term τ of the microhole sensor changed 1.7-fold over this temperature range, and τ of the membrane sensor changed 1.6-fold. For the microhole sensor, the effect of temperature on τ can be modeled as lnτ+−6.5 + 1618T−1. For the membrane sensor the temperature effect on τ can be modeled as lnτ = −5.8 + 2116T−1, where T is temperature in kelvins.

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