Bottoms_Up
Well-Known Member
Why not use a stick-on thermometer. I have one on each carboy. https://encrypted-tbn1.gstatic.com/...KA63Mel1mF-EZ9CfdRlmYU6Hq3jADbbOkqZ0MH3qlA6Hw
I thought about that, but I read that they are not very accurate, since they pick up some of the temperature of the air outside the carboy. Thus they could indicate a temperature several degrees lower than the interior wort temperature. But I suppose it could give a relative indication.