Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > Temperature probe placement in Keggle MLT?
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Old 02-11-2011, 07:04 PM   #1
Cpt_Kirks
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Default Temperature probe placement in Keggle MLT?

I'm marking the hole positions in my keggle MLT for drilling. I will be using it for both 5 and 10 gallon batches.

How high can I place the temperature probe and still be low enough to measure the temp in a 5 gallon batch?

This will be for visual temperature checking, if I go to a HERMS setup later, I will probably add another probe.



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Old 02-11-2011, 08:29 PM   #2
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Put 5 gallons of water in the keg and make the hole lower than the water level.


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Old 02-11-2011, 09:25 PM   #3
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Quote:
Originally Posted by jvino View Post
Put 5 gallons of water in the keg and make the hole lower than the water level.
So, you are saying that 5 gallons of water takes up the same space as about 10 pounds of malt and 3 to 4 gallons of water?

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Old 02-11-2011, 11:42 PM   #4
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lol. i see what you mean. i cant answer the question since i dont have experience working in a keggle. but you might have to just go trial and error, or just plan to install it at the same height as your drain valve fitting so you never have to worry about it. if its going to have a false bottom, just make sure its above that
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Old 02-12-2011, 01:01 AM   #5
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Yes, good point. I didn't think about that. Maybe just put 4 gallons in there and put the hole below that. That way when you have 3+ gallons of water and grain in there you should be good to go.
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Old 02-13-2011, 06:00 PM   #6
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Using the formula in "How To Brew", I get a grain bed depth of about 4.3 to 4.5 inches, depending on how much mash water is used.

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Old 02-13-2011, 06:34 PM   #7
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Quote:
Originally Posted by Cpt_Kirks View Post
So, you are saying that 5 gallons of water takes up the same space as about 10 pounds of malt and 3 to 4 gallons of water?

Yes, the total mash volume when using 10 lbs of malt with a water to grain ratio of 1.5 qt/lb (3.75 gallons) would be 5 gallons.

The five gallon depth should be close to 6.5 inches measured from the lowest point in the center of the keg's concave bottom. The ten gallon depth should be close to 12.75 inches at the center.
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Old 02-14-2011, 12:59 AM   #8
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Quote:
Originally Posted by Catt22 View Post
Yes, the total mash volume when using 10 lbs of malt with a water to grain ratio of 1.5 qt/lb (3.75 gallons) would be 5 gallons.

The five gallon depth should be close to 6.5 inches measured from the lowest point in the center of the keg's concave bottom. The ten gallon depth should be close to 12.75 inches at the center.
Did you use a formula for that, or are the levels from actual measurement?

Measured from the lowest part of the keggle, my faucet hole is centered right at 3 inches.
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Old 02-14-2011, 03:49 AM   #9
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Quote:
Originally Posted by Cpt_Kirks View Post
Did you use a formula for that, or are the levels from actual measurement?

Measured from the lowest part of the keggle, my faucet hole is centered right at 3 inches.
I used ProMash to for the mash volume. It's a function of the strike water calculator.

The depth measurements are based on an inches to gallons conversion factor for a standard Sankey keg. The volume contained in the concave kettle bottom must be considered, but being a constant, it's no big deal to do so.
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Old 02-14-2011, 04:12 AM   #10
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Why don't you just put the probe into the outlet like Lonnie does on his Brutus 10 design?


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