The Blichmann Brew commander probe will only fit the Blichmann fitting. It is too fat for Thermowell's. I do not like the choice of the Brew commander fittings. They don't have a good 1/2 inch NPT option. The little weldless fitting they include with the unit has a tiny O ring which spits over time spilling berr all over the ground. The other thing is I tried a Inkbird probe in the Brew commander and it wouldn't even read it. Again, Blichmann plays by their own music and doesn't play well with others (systems). I know the Clawhammer controller is nice, but it is made by inkbird. If you search Inkbird 240V brew controller on Google, you will find one. With discount it is $470 bucks which is a considerable savings over the Clawhammer. I am guessing when Morebeer and other homebrew sites starts to sell these the price will come down considerably.