I was going to suggest drilling a small hole in the lid and putting a small rubber grommet in the hole, then inserting a long stem dial thermometer through it. If you can find a stopper with two holes where one is a bit smaller to fit the airlock and one a dial thermometer with an upright display, that might work. You'd need to see if the dial got in the way of the airlock.
That said, the beer on a 7 or 14 gallon conical is going to be within a degree of the room temperature after it stabilizes anyway. I have a thermometer in mine, but don't pay much attention to it. Then again, I'm not brewing beers that are sensitive to temperature very often either (e.g., german hefe's, etc.).
The weldless thermometers aren't a sanitary design. You'll have threaded fittings, nut, etc. sitting in your wort/beer. Not clean.
|