Happy HolidaySs Giveaway - Winners Re-Re-Drawn - 24 hours to Claim!

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


Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Wort Temp vs. Fermentaiton Chamber Temp
Reply
 
LinkBack Thread Tools
Old 09-29-2012, 12:43 AM   #1
BeezyHeezy
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Lafayette, Louisiana`
Posts: 17
Liked 4 Times on 4 Posts
Likes Given: 2

Default Wort Temp vs. Fermentaiton Chamber Temp

Does anyone have any experience or reasonable estimations for the expected temperature of the fermenting wort in its vessel (carboy or ale pail) compared to the temperature of the surrounding air?

I got myself a perfect little fermentation fridge (after several batches tasting exactly as ****ty solvent-like as the previous; in LA [Louisiana, not city del angels] avg. ambient temps of 75) and figured to set to something in the neighborhood of 65 to keep wort temps below 68. I don't want to immerse my temp probe (from a Johnson controller) in the wort b/c I sanitize the bare minimum and don't want to add to my workload.

I generally primary in a bucket and transfer to carboy for conditioning and clarifying and have been mostly using harvest Nottingham b/c the sweet sweet missus is eyeing the budget!

Thanks

Edit: Son of a Bitch! I misspelled the damn thread title! Better pour another cold one.

__________________
BeezyHeezy is offline
 
Reply With Quote Quick reply to this message
Old 09-29-2012, 12:50 AM   #2
jubelale
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Las Vegas, NV
Posts: 70
Liked 3 Times on 3 Posts
Likes Given: 1

Default

Temps can be anywhere from 5 to 10 degress higher depending on how vigorous the yeast are fermenting. Just tape the probe to the carboy to keep it at the set temp.

__________________
jubelale is offline
 
Reply With Quote Quick reply to this message
Old 09-29-2012, 12:50 AM   #3
Paul07293
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Paul07293's Avatar
Recipes 
 
Join Date: Apr 2011
Location: , NY
Posts: 282
Liked 6 Times on 5 Posts
Likes Given: 21

Default

I use bubble wrap and duct tape to secure the probe to the side of the fermenter. This gets you the temp of the fermenting beer not the air in the frig.

__________________
Beer, if drank with moderation, softens the temper, cheers the spirit, and promotes health.
-Thomas Jefferson
"Give me a woman who truly loves beer and I will conquer the world." - Kaiser Wilhelm
"I would kill everyone in this room for a drop of sweet beer."- Homer Simpson
Paul07293 is offline
 
Reply With Quote Quick reply to this message
Old 09-29-2012, 12:56 AM   #4
Double-R
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Newburgh,NY
Posts: 316
Liked 9 Times on 8 Posts
Likes Given: 1

Default

A piece of foam over the probe.. Then tape it over the bucket.
That works the best.. don't just let it hang in fridge .

__________________
I kiddd,I kiddd.. I joke with U..,
Double-R is offline
 
Reply With Quote Quick reply to this message
Old 09-29-2012, 01:27 AM   #5
BeezyHeezy
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Lafayette, Louisiana`
Posts: 17
Liked 4 Times on 4 Posts
Likes Given: 2

Default

Sweet. I'll plan on going the foam route since I have some on hand. I might still set the controller a few degrees cooler until I have a few batches though it for comparison. Gracias.

__________________
BeezyHeezy is offline
 
Reply With Quote Quick reply to this message
Old 10-01-2012, 01:01 AM   #6
jfr1111
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Quebec, Quebec
Posts: 1,579
Liked 60 Times on 53 Posts
Likes Given: 1

Default

Even if you tape the probe to the bucket, there's no guarantee the temperature won't be higher in the beer for two reasons.

First, the johnson controller (if analog) has a 2.5 degree "swing", meaning that if you set it at 60F, it'll wait until the temperature is 62.5F to kick in and then it'll keep the motor running until the temperature is 57.5F. Second, if you use a bucket, the bucket serves as insultation and the temperature might be higher inside the bucket than on the outside. Also, any controller is not necessarily calibrated.

The best way to go about is to tape the probe to the fermentor, but still have a digital thermometer that you absolutely trust to take a reading to double check, just to be sure. I used the method described above for my last beer, set the probe at 66F and woke up to a 72F beer this morning (as per my trusty thermometer)... It's better to shoot low, check with your thermometer and then go from there.

__________________
jfr1111 is offline
 
Reply With Quote Quick reply to this message
Old 10-01-2012, 01:14 AM   #7
jammin
HBT_LIFETIMESUPPORTER.png
Feedback Score: 2 reviews
 
jammin's Avatar
Recipes 
 
Join Date: Jun 2011
Location: Meridian, ID
Posts: 1,357
Liked 211 Times on 166 Posts
Likes Given: 140

Default

A thermowell is the best way to go:

http://www.brewershardware.com/Strai...l-Thermowells/

Just drill a hole in the lid of your bucket. Too easy

__________________
jammin is offline
 
Reply With Quote Quick reply to this message
Old 10-01-2012, 05:03 AM   #8
Horseflesh
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2012
Location: Woodiville, WA
Posts: 123
Liked 9 Times on 9 Posts

Default

If you use a thermowell like that, does there need to be anything special about the temperature probe? Or can you just put in any old thing that fits?

__________________
Horseflesh is offline
 
Reply With Quote Quick reply to this message
Old 10-01-2012, 08:52 AM   #9
snowbeavers
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: KL, Malaysia
Posts: 18
Default

Funnily enough, I was thinking of the exact same thing this morning. I did a brew last night and because I live in the tropics where the ambient temperature if always over 30 degrees, we are constantly looking for ways to keep the temp down.

I bought a commercial fridge recently and turned it down to the lowest setting (+17 degrees celcius) but looked on the outside of my fermenter (coopers one that is pretty thick) and it said it was only 12 degrees (on the cheap one on the outside of the fermenter)! I panicked, took it out but it was already bubbling away. My girlfriend and I figured out that the temp inside must be much warmer because the yeast is active and because of the insulation of the fermenter.

So I put the thing back in the fridge and crossing my fingers. I think it is better to keep it cooler initially as this is when the yeast is most active.

__________________
snowbeavers is offline
 
Reply With Quote Quick reply to this message
Old 10-01-2012, 07:32 PM   #10
BeezyHeezy
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Lafayette, Louisiana`
Posts: 17
Liked 4 Times on 4 Posts
Likes Given: 2

Default

JFR, The johnson controller is digital (http://www.amazon.com/gp/product/B00...ls_o03_s00_i00) and the offset is programmable down to 1 degree. Good point on the calibration. I'll check it next chance I get.

Thanks for the thermowell link Jammin; I'll get some knowledge. I'm cold crashing my first brew with the setup and will keg tonight for results. If they're not as expected (delicious) I'll be doing more work to my temp control.

__________________
BeezyHeezy 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
Fermentation Temp - Ambient or Wort Temp? TheZymurgist Fermentation & Yeast 1 11-01-2011 03:43 PM
Water Bath temp vs. Wort Temp Rockweezy Fermentation & Yeast 4 07-01-2011 07:03 AM
Wort temp vs. ambient temp badmajon Fermentation & Yeast 6 05-05-2011 09:46 PM
lager starter temp vrs wort temp ohdannyboy Fermentation & Yeast 2 02-08-2011 10:57 PM
Ambient temp or Wort Temp yellowthunda Fermentation & Yeast 1 09-15-2010 01:06 AM



Newest Threads

LATEST SPONSOR DEALS