Fermentation Kit with Northern Brewer Dual Stage Temp ControllerIn one fell swoop, you can control the most important variable in making great beer temperature. Wrap your brew in the warmth of the electric fermentation heater, and dial in the exact temperature you need with the Northern Brewer Dual Stage Temp Controller. It's that simple. This is the perfect addition to your fermentation chamber, or exactly what you need to get started building your own! Control fermentation with razor sharp precision, monitoring