Thanks for the link. I actually took a look at Kai's post and I might up going with the updated version of what he picked up at some point. For now, I picked up a $31 one on Amazon (Hanna 98103B) to see if it works. If it doesn't, I'll upgrade, but I wanted to get a refractometer as well because I decided I'm tired of hydrometers! I also found out that Hanna is headquartered in Rhode Island, which is where I live, so maybe I'll see if I can pay them a visit at some point.