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Home Brew Forums > Home Brewing Beer > Electric Brewing > 2" vs. 4" RTD probe
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Old 02-02-2011, 07:53 PM   #1
beeguy
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Default 2" vs. 4" RTD probe

I will be using it in a T pipe coming out from the coil. My concern is that with the 2" it won't stick in enough after I add the 1/4" to 1/2" NPT adaptor while the 4" would give a better reading? But then the 4" would have more flow restriction. Which do you guys use? Does the 2" still go into enough wort with the adaptor?


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Old 02-02-2011, 08:03 PM   #2
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My thermocouple I'll be using is only about 1/4" long into the keg. It's the same one Pol used on his first electric build and it seemed to work fine. On the other hand, I don't think I'd be worried about a thermometer probe causing any flow issues if you went the with 4"


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Old 02-02-2011, 08:08 PM   #3
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Quote:
Originally Posted by beeguy View Post
I will be using it in a T pipe coming out from the coil. My concern is that with the 2" it won't stick in enough after I add the 1/4" to 1/2" NPT adaptor while the 4" would give a better reading? But then the 4" would have more flow restriction. Which do you guys use? Does the 2" still go into enough wort with the adaptor?
Is this for a rims chamber? If so I ended up using a 4inch after using 2 reducers from the T.
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Old 02-02-2011, 09:34 PM   #4
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As you may already know... approx. 1/4" of the end of the RTD is the only place where the platinum resistence element is affected by temperature. The remaining length is just a sheath.
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Old 02-03-2011, 05:36 AM   #5
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It is for a HERMS system. The T will be placed after the coil and before the MLT. Good to know only the tip reads. How much "blockage" do you guys feel the probe puts in the pipe?


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