Sucrose refractometer for salt?

[aquanaut]

Hello

I was given a sucrose refractometer from a friend that no longer needed it. It is a Brix 0-10 20C . Is there a way to use it for salinity. Is there a scale to substitute % of sucrose to salinity? Or would I have make a calibration sample of water/salt and see what the percent is? There has to be some sort of chart to cross- reference ????


Thanks