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Ref. No. [UMCES] CBL 2015-014
ACT VS15-07
47
Figure 24.
Time series of pH measured by the Xylem EXO pH instrument during the 1 month CBL field
trial.
Top Panel
: Continuous pH
Total
recordings from instrument (blue line) and pH
Total
of adjacent grab
samples determined by mCP dye (red circles).
Bottom Panel
: Difference in measured pH relative to
reference samples (Instrument – Dye Ref) observed during deployment. Dashed line represents offset (ca
0.13) predicted due to difference in pH
NBS
and pH
Total
scales used by the EXO pH sensor and the dye
reference method.