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Home Brew Forums > Home Brewing Beer > Electric Brewing > Herms coil in hlt: pid-sensor placement
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Old 11-20-2014, 01:24 PM   #1
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Default Herms coil in hlt: pid-sensor placement

I've just moved my herms coil to the hlt.

I must be overlooking something..

The heating elements in the hlt are triggered by the sensor sitting on the exit of the coil. But when I'm about to spathe this sensor will not track the spathe water.

How do I maintain temp for sparge water during sparging?

Right now I moved the sensor which I have in the hlt to the herms pid so the hlt sensor controls the elements. But there must be a better way?

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Old 11-20-2014, 02:09 PM   #2
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A lot of folks control the HERMS, by simply having one sensor in the HLT. Control that temp, and you will control the wort temp. Because, aren't they basically the same? That is what I've always done.

Individual results may vary

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Old 11-20-2014, 07:46 PM   #3
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Quote:
Originally Posted by The Pol View Post
A lot of folks control the HERMS, by simply having one sensor in the HLT. Control that temp, and you will control the wort temp. Because, aren't they basically the same? That is what I've always done.

Individual results may vary
This...
I have one temp probe in the HLT then you can control the HLT temp any time, even when there is nothing in the coil.
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Old 11-21-2014, 05:43 PM   #4
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Doh! My mind was stuck on doing the same as before.

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Old 11-21-2014, 05:56 PM   #5
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do you pump the entire mash then? I was watching a video on High Gravity brewing and they seem to have a pid for the HLT for maintaining temp, and one on the MT that would kick on the pump when the temp drops. seemed like a good idea to not run the pump the whole mash

http://www.highgravitybrew.com/store...trol-p3858.htm

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Old 11-21-2014, 06:40 PM   #6
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Cycling a pump to control mash temps is an alternative philosophy on HERMS brewing and I think it's an older idea. The known problem with this is stratification in the mash tun can cause the pump cycling to be erratic. It's only measuring one small pocket of mash temp.

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Old 11-21-2014, 10:19 PM   #7
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I put my thermowell at the output of the HERMS coil. I don't care what the HLT water temp is. I control the temp of the wort returning to the mash tun.

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Old 11-22-2014, 03:00 AM   #8
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Quote:
Originally Posted by stevehaun View Post
I put my thermowell at the output of the HERMS coil. I don't care what the HLT water temp is. I control the temp of the wort returning to the mash tun.
This guy gets it!
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Old 11-22-2014, 03:58 AM   #9
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Quote:
Originally Posted by stevehaun View Post
I put my thermowell at the output of the HERMS coil. I don't care what the HLT water temp is. I control the temp of the wort returning to the mash tun.
So you don't do anything about the sparge temp?
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Old 11-22-2014, 04:09 AM   #10
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Quote:
Originally Posted by stevehaun View Post
I put my thermowell at the output of the HERMS coil. I don't care what the HLT water temp is. I control the temp of the wort returning to the mash tun.
So you don't do anything about the sparge temp?
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