Looking to add a thermowell to your Speidel plastic fermenter? This is the perfect way to do it. This thermowell replaces the airlock on top of your fermenter and uses the standard Speidel locking nut and gasket. The rubber grommet will fit standard 3/8 in. airlocks and the thermowell will accept most temperature probes.

The probe is 12" and will fit most 1/4" digital temp probes.