I'm using this as well, has yours been pretty accurate so far?One of these if you are using a cooler for a MTL, and it has a timer too. And as I found out today, a spare hydrometer. Thankfully, I had a spare.
Thanks that's a great ideaByramMike said:I recommend you do a test with your mash tun to determine the rate of your temp loss (if any). This allows you to plan your water strategy. I second having a good thermometer and a second kettle to heat water in.