Refractometer ?

[xc700dave]

I have a refractometer that i use at work 0- 10%. The scale reads
from 0 - 10 with 10 marks in each number. can i convert these
readings to sg

 

[tony detroit]

Spend the forty bucks and get one made for what you're doing. You may not have the right type. Those floaters suck anyway, if there is any current they bounce all over the place.