Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Fermenation temp vs fridge temp
Reply
 
LinkBack Thread Tools
Old 06-09-2010, 12:15 AM   #1
Gritsak
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: IN
Posts: 593
Liked 13 Times on 12 Posts

Default Fermenation temp vs fridge temp

I've read that during active fermentation beer temp can be 10+ degrees higher than ambient temp. Does this rule apply to a small space, such as a mini fridge? I just picked up a second Sanyo 4912 to use for fermenting since it's getting hot in my apartment. What should i set my Johnson temp controller to if i want the beer to stay around 65 degrees?

I'm also assuming the way the probe is mounted affects this. Right now i've got it hanging at the top of the fridge, but i was considering submerging it in water or blue freeze pack gel if that would yield more accurate control.

__________________

I brew lots of beer.

Gritsak is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 12:24 AM   #2
Opherman47
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Opherman47's Avatar
Recipes 
 
Join Date: Jan 2008
Location: Nashville, TN
Posts: 246
Liked 1 Times on 1 Posts
Likes Given: 1

Default

jamil says tape it to the side of the carboy and surround it with Styrofoam so that it takes temp from the carboy and not the ambient air

__________________
Opherman47 is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 12:41 AM   #3
Gritsak
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: IN
Posts: 593
Liked 13 Times on 12 Posts

Default

Quote:
Originally Posted by Opherman47 View Post
jamil says tape it to the side of the carboy and surround it with Styrofoam so that it takes temp from the carboy and not the ambient air
That's a good idea. Thanks
__________________

I brew lots of beer.

Gritsak is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 01:42 AM   #4
jkarp
Beer Herder
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jkarp's Avatar
Recipes 
 
Join Date: Jun 2008
Location: Elizabeth, CO
Posts: 2,105
Liked 34 Times on 29 Posts
Likes Given: 4

Default

Quote:
Originally Posted by Opherman47 View Post
jamil says tape it to the side of the carboy and surround it with Styrofoam so that it takes temp from the carboy and not the ambient air
That's only applicable for the digital controller. Using the analog, you're better off just leaving the sensor in open air and monitoring ferm temp via a stick-on thermometer because the analog unit has a 4 deg differential.
__________________
jkarp is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 03:28 AM   #5
Tom
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2005
Location: Denver
Posts: 111
Default

Ditto
If you have the digitial controller you can adjust the differential to 1 degF and tape the probe to the side of the fermenter and cover it with insulation. Don't put it into another jar of liquid, that only increases the time constant.

__________________
Tom is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 03:37 AM   #6
Gritsak
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: IN
Posts: 593
Liked 13 Times on 12 Posts

Default

I have the dial version, so apparently that won't work. Maybe keeping the probe at the top of the fridge will help compensate for increased temps during fermentation since cold air sinks?

__________________

I brew lots of beer.

Gritsak is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 03:45 AM   #7
jkarp
Beer Herder
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jkarp's Avatar
Recipes 
 
Join Date: Jun 2008
Location: Elizabeth, CO
Posts: 2,105
Liked 34 Times on 29 Posts
Likes Given: 4

Default

Quote:
Originally Posted by Gritsak View Post
I have the dial version, so apparently that won't work. Maybe keeping the probe at the top of the fridge will help compensate for increased temps during fermentation since cold air sinks?
Just slap a stick-on thermometer on the fermenter and adjust the JC accordingly. Air temp will fluctuate 4 deg but you'll find the fermenter stays constant because of the thermal mass.
__________________
jkarp is offline
 
Reply With Quote Quick reply to this message
Old 06-09-2010, 06:54 AM   #8
kmk1012
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Oregon
Posts: 230
Liked 2 Times on 2 Posts

Default

I've been wondering the same thing-thanks for all the info!

__________________
kmk1012 is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Temp controlling a fridge? claphamsa Bottling/Kegging 6 11-10-2009 02:55 AM
Fridge temp control..... EamusCatuli Equipment/Sanitation 9 11-21-2008 02:35 AM
Fridge Temp bulleitb Beginners Beer Brewing Forum 3 07-12-2008 02:01 PM
Fridge & Temp. Control Danny013 Equipment/Sanitation 2 06-16-2008 08:19 PM
Lager fermenation temp Kokamantratarius General Techniques 4 03-27-2007 03:29 AM



Newest Threads

LATEST SPONSOR DEALS