revelation over high final gravity

[the teacher]

I've been struggling with my FG staying at 1.020 for every batch the last few months. I've methodically changed each part of my process to find the problem. It wasn't the yeast, fermentation temp, or recipe ratios. Today I read a post about calibrating thermometers. I have a blichmann brewmometer installed in the side of my mash tun. I pulled it out and tested it in a pot of boiling water. It was off by at least 5 degrees. I've been mashing 5 degrees higher than I thought for months.

I thought this might help help someone.

 

[Hammy71]

Yes, I found out the same thing back in the summer. Found a good digital thermometer that I can calibrate and set all my other thermometers with it. Makes a big deal.