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Old 10-26-2011, 08:09 PM   #1
cswank
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Mar 2008
Posts: 20


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?

 
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Old 10-26-2011, 08:22 PM   #2
cheezycow
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May 2011
Charlotte, North Carolina
Posts: 38

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.

 
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Old 10-26-2011, 08:55 PM   #3
cswank
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Mar 2008
Posts: 20

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.

 
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Old 10-26-2011, 08:57 PM   #4
asterix404
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Mar 2009
Natick, MA
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Are you heating your mash tun while mashing?

 
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Old 10-26-2011, 09:02 PM   #5
cswank
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Mar 2008
Posts: 20

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.

 
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Old 10-26-2011, 10:51 PM   #6
BOBrob
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Oct 2010
escanaba, michigan
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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

 
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Old 10-26-2011, 11:08 PM   #7
cswank
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Mar 2008
Posts: 20

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.

 
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