Sensors
©
2021
– Valeport Ltd
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3.6.1.3 Calculated Density
From directly measured sound velocity, temperature and pressure, SWiFT calculates Salinity using
a proprietary Valeport algorithm developed from extensive laboratory and fieldwork. This salinity
value is then used to compute Density using standard EOS80 formulas.
Type:
Calculated
Accuracy:
±0.05 kg/m
3
Resolution:
0.001 kg/m
3
3.6.2
SWiFT CTD
3.6.2.1 Calculated Sound Speed
From directly measured conductivity, temperature and pressure, sound speed is calculated using
standard EOS80 formulas
.
Type:
Calculated
Accuracy:
±0.025-0.30 ms
-1
(Chen & Millero)
Resolution:
0.001 ms
-1
3.6.2.2 Calculated Salinity
From directly measured conductivity, temperature and pressure, salinity is calculated using
standard EOS80 formulas
.
Type:
Calculated
Accuracy:
±0.01 PSU
Resolution:
0.001 PSU
3.6.2.3 Calculated Density
From directly measured conductivity, temperature and pressure, density is calculated using
standard EOS80 formulas
.
Type:
Calculated
Accuracy:
±0.01 kg/m
3
Resolution:
0.001 kg/m
3
