This temperature probe is intended to be submersed into your beer to more accurately regulate the internal temperature during fermentation.
No need to worry about inserting a smaller probe into a separate thermowell temperature probe. This connects directly to your Fermostat for a simple and very accurate fermentation setup.
Probe Dimensions: 8mm x 380mm (0.31in x 15in)
Cord Length (excluding probe): 2m (80in)
** You may need a carboy stopper with a second hole to accommodate both a probe and airlock, select the option you need from the dropdown.