Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Mash Temperature Inversion
Reply
 
Thread Tools
Old 10-26-2011, 08:09 PM   #1
cswank
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Posts: 20
Default Mash Temperature Inversion

Hello, I'm just wondering if anyone else has noticed a large temperature inversion in the mash. I have a temperature probe that comes in from the top of my mash vessel (a large stainless pot), and I can move it around. I'm brewing right now and the temperature at the bottom of the mash is ~160, and at the top it is ~152 F.

If I stir it up the temperature at the bottom approaches my target temperature, but right away it starts climbing back up.

Should I just relax, have a home brew, and not worry about it?


cswank is offline
 
Reply With Quote
Old 10-26-2011, 08:22 PM   #2
cheezycow
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Charlotte, North Carolina
Posts: 38
Default

Make sure everything is well stirred and check in about 5 mins. If the temp hasn't stabilized might consider a little cold water to bring it down to target.


cheezycow is offline
 
Reply With Quote
Old 10-26-2011, 08:55 PM   #3
cswank
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Posts: 20
Default

I guess what I really want to know is if an 8 degree F temperature differential between the top and bottom of the mash is common.
cswank is offline
 
Reply With Quote
Old 10-26-2011, 08:57 PM   #4
asterix404
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Natick, MA
Posts: 541
Liked 8 Times on 8 Posts
Likes Given: 3

Default

Are you heating your mash tun while mashing?
asterix404 is offline
 
Reply With Quote
Old 10-26-2011, 09:02 PM   #5
cswank
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Posts: 20
Default

I have heating pads on the outside that kick automatically in when the temperature falls too low. The temperature difference happens right away before the hearing pads turn on.
cswank is offline
 
Reply With Quote
Old 10-26-2011, 10:51 PM   #6
BOBrob
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2010
Location: escanaba, michigan
Posts: 582
Liked 8 Times on 7 Posts

Default

Is your manifold copper and if so is the end of probe touching it or very nearly so? Copper holds original temp. longer. just thinken. Cheers
BOBrob is offline
 
Reply With Quote
Old 10-26-2011, 11:08 PM   #7
cswank
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Posts: 20
Default

Thanks for the suggestion. My probe is ~1" above the bottom when it is in place. The bottom of the pot does have some layers of other metals that could hold a bunch of heat from when the hot water pours in. That could very well be the reason. Good idea.


cswank is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mash Temperature - how low is too low avshook All Grain & Partial Mash Brewing 10 02-08-2012 01:41 PM
Partial Mash Question - mash temperature too high, low O.G.? KSR All Grain & Partial Mash Brewing 8 03-15-2011 08:18 PM
Mash Thickness VS Mash Temperature jjones17 All Grain & Partial Mash Brewing 13 01-14-2010 08:46 PM
Mash Temperature Chub All Grain & Partial Mash Brewing 1 08-18-2009 07:03 AM
Help: Low Mash Temperature alfista All Grain & Partial Mash Brewing 6 12-20-2008 08:57 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS