Thermowell bulkhead
thingiverse
This is a custom fit for a 1/4 inch ID thermowell that lets a DS18B20 temperature sensor sit snug inside your carboy. Check out this example thermowell here: https://www.brewershardware.com/16-Stainless-Steel-Thermowell-TWS516-16.html\r\nThrowing in two rubber gaskets creates an airtight seal every time. The picture shows the bulkhead paired with a 5/8 inch drilled Fermonster lid - just needs that fermentation lock hole added.
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