This glass carboy thermowell is used with a digital thermostat to more accurately regulate internal temperature in your carboy during fermentation. Pair up with a digital controller and keep your ferment within one degree of the set target.
Includes a 15" stainless steel thermowell and a #6.5 stopper that will fit in a glass carboy.
Note: This will not work with Johnson Temperature Controllers because their probes are too large for the thermowell.