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-   -   Beer Temp VS Ambient Temp (http://www.homebrewtalk.com/f163/beer-temp-vs-ambient-temp-395938/)

wdwalter 03-08-2013 01:47 AM

Beer Temp VS Ambient Temp
 
2 Attachment(s)

Pretty clear picture of how Beer temp is not always the same as Air temp. This was a Hefeweizen second day in primary. Fermented a little cooler than what I wanted but samples from primary taste great. This was a digital thermometer with the probe suspended in the center of the fermenter.


wdwalter 03-08-2013 01:47 AM

Beer Temp VS Ambient Temp
 
2 Attachment(s)

Pretty clear picture of how Beer temp is not always the same as Air temp. This was a Hefeweizen second day in primary. Fermented a little cooler than what I wanted but samples from primary taste great. This was a digital thermometer with the probe suspended in the center of the fermenter.


DSmith 03-08-2013 12:42 PM

1 Attachment(s)

I data log active fermentations using 2 thermocouples (example graph below). The air inside the chest freezer will change a lot over time, but the beer temperature (measured with a probe well-insulated over on the side of the fermentor) can be kept within a very small range. I've never put a thermocouple into the beer.

Attachment 106103


DSmith 03-08-2013 01:16 PM

1 Attachment(s)

Definitely not trying to one-up anybody. Hopefully these graphs illustrate how radically the air temperature can change and have minimal effect on the beer temperature. All you can do with a freezer is minimize the time that it's on but find settings that do not cycle it too often.

I use the TSS2 controller with a heater on the 2nd relay that takes over when fermentation begins to slows.

I've been brewing almost exclusively Belgians recently with the intent to make a very estery beer at controlled temperatures, yeast pitch, aeration. The graph below is from a Tripel with gravity data overlayed (by refractometer with alcohol correction). After final gravity is confirmed the primary is cold crashed, transfer to secondary and cold conditioning begins.

Attachment 106104



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