A refractometer was on my list of shiny brewing equipment I might get.  And with my hydrometer in shards, I figured now was the time to try it out.  Amazon had a ton of options, many reasonably priced, and so one arrived at our doorstep in a few days.

I was excited about using a refractometer to do gravity readings, because I’d read about it being more precise, using a tiny sample, and not having to do temperature corrections (the tiny sample makes the temperature insignificant compared to the refractometer temp.).  However, I quickly learned two things:

1. You don’t have to do temperature corrections.  But once fermentation starts, you have to do some pretty complicated math based on the original gravity.  So I still need a computer to do gravity readings once fermentation starts.

2. While in theory the display is supposed to be very precise (it’s supposed to look something like this):

In practice, it looks more like this:

So I’m not sure it’s actually any more precise.  Still, the sample size really is just a few drops, and I’m looking forward to the next brew where I can do gravity readings with hot wort and not have to use a computer to do temperature corrections.