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Ref. No. [UMCES] CBL 2015-010
ACT VS15-03
Figure 16.
Time series of pH measured by Idronaut 305 Plus pH sensor deployed during the 1 month
GLERL trial.
Top Panel
: Continuous pH
NBS
recordings from instrument (blue line) and pH
Total
of adjacent
grab samples determined by phenol red dye (red circles).
Bottom Panel
: Difference in measured pH
relative to reference samples (Instrument – Dye Ref) observed during deployment. Dashed line represent
offset (ca 0.13) predicted due to difference in pH
NBS
and pH
Total
scales used by the Idronaut sensor and the
dye reference method.
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