Ranco two stage digital temperature controller. A two stage temp controller allows you to control both a heating and a cooling mechanism so that you can easily dial in fermentation temperature.
RANCO ETC-211000 Digital Temperature Control 2 stg - $98.31 + $9.45 Shipping
If you're looking for a single stage Ranco controller, check out this recent find...
ETC-111000 Digital Temp Controller - $49.85 + Free expedited shipping
Related: Amazon, Temp Control, Fermentation
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