Salinity meters/hydrometers

[Snaz]

Originally Posted by NAS

So, when I use it on a day to day basis i just add .03 to it and it's corrected.

That's how a calibrated glass hydrometer works. With a couple of known solutions measure the standard deviation and then apply that deviation to the observed reading.

So once you know your hydrometer consistently reads +.03, add that to the observed result for an accurate measurement.

Of course by measuring anything you are changing it so you can never have a "TRUE" 100% no questions asked result.