Johnson Digital Temperature Controller – Fermentation Thermostat Review
The Johnson Controls digital temperature controller can be used for a variety of home brewing functions. You can use it to keep an exact temperature in your kegerator, keezer, fermentation refrigerator or freezer, or it can be used to activate a heating element such as a heating pad to increase temperatures if needed.
I have my Johnson Controls Digital Temperature Controller hooked up to my fermentation freezer. It comes fitted with a wired temperature sensor that I attach to the side of my carboy or secondary fermentation keg. I insulate the side of the temperature sensor that is exposed to the air with some foam insulator and tape it to the side of the fermenter so that I can get as precise of a temperature reading as possible. There are also thermowells available that allow you can get an exact temperature reading of the inside of the fermenter.
One of the things that I like most about the Johnson Controls Digital Thermostat is that it allows you to set a temperature variance and a anti-short cycle delay. This comes in handy as a method for preventing the compressor on my freezer from constantly turning on and off, which could cause damage to it over time. I have it set to keep the temperature of my freezer within a 2 degree variance of my target fermentation temperature, and it works perfectly. The freezer rarely activates more than once every 30 minutes or so, even during primary fermentation. If it is detects a fault, I have it set to disable the freezer so that I do not freeze and destroy my batch of beer and blow up some of the bottles I have stored in there as well. I try to check on it everyday just to make sure all is well.
The Johnson Controls Digital Temperature Controller has met and exceeded all of my expectations, and I give it a 5 out of 5 stars review.
If you are interested in buying a Johnson Controls Digital Thermostat, they can be found here:
Photo #1 of the Johnson Controls Digital Thermostat
Photo #2 of the Johnson Controls Digital Temperature controller being run into my fermentation freezer where it is attached to one of the glass carboys to regulate the temperature of the fermentation.