- Mar 2, 2016
- Reaction score
Oceanographers generally use conductivity. The practical salinity scale (PSU) is actually defined by conductivity. Hydrometers (and refractometers) are mostly a hobbyist thing.
So I have 2 conductivity meters that provide different measurements after calibration. Interestingly enough, the GHL's calculated density marches the High-precision Hydrometer. However, the GHL's conductivity readings don't match what the calculated SG should be.
So if I trust GHL's density which matches the High-precision Hydrometer, I need to drop my salinity to get into the 1.0264 SG range. Or do I go with GHL's conductivity [email protected] would puts my High-precision Hydrometer somewhere over 1.028 SG and my Hanna over 37ppt.