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Ref. No. [UMCES] CBL 2016-014
ACT VS16-05
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The global response of the Hach HL4 LDO for the eight temperature-salinity trials is shown
in figure J. This plot includes all logged instrument-reference comparisons (n=290). Instrument
readings were well correlated across the entire range of DO concentrations (hypoxic to supraoxic)
covering all temperature and salinity ranges tested. A linear regression of the instrument versus
reference measurements (r
2
= 0.99; p<0.0001) produced a slope of 1.021 and intercept of -0.181.
Figure J.
Concordance of the Hach HL4 LDO (sn 0431) oxygen measures paired with discrete
Winkler DO reference samples. In general readings are well correlated across a range of DO
concentrations (hypoxic to supraoxic). Dotted line represents perfect agreement between the two
measures.