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Thread: Stock Therm in WSM...how accurate?

  1. #1
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    How accurate is the stock therm in the WSM (18.5, in my case)? In my experience, Weber's therms have been pretty close in kettles I have or have had...

  2. #2
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    Jacob Ihave a WSM 22.5 and my therm was off between 25 to 30 degrees.

    Allyn

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    Thanks, Allyn

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    TVWBB Honor Circle Bob Mann's Avatar
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    The thermometer is accurate, but because of it's location, it often reads much different from the actual grate temperature.
    "Beer is living proof that God loves us and wants us to be happy." - B Franklin
    | 18 1/2" and 22 1/2" WSM | 22 1/2" and 26 3/4" OTG | Genesis S-330 |

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    The 2 times I've used mine so far it reads about 12-15 degrees lower then my maverick.

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    TVWBB Pro RichPB (richlife)'s Avatar
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    I've always found the WSM therm to be about 30* lower than my Maverick, but both are very consistent from time to time. I don't think it matter much which you use for the cooker temp as long as you get used to it.

    Rich
    UNC Tar Heel '69, '75 -- now Woodworker, grandfather
    Weber Genesis EP-330, Smoky Mountain 18.5

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    Thanks for the replies, folks!

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    TVWBB Member Jason Smart's Avatar
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    Originally posted by Jacob Montgomery:
    Thanks for the replies, folks!
    Unbolt the thermo from the lid and with a pair of tongs, place the probe in a pot of boiling water and check the temp. If it reads around 212, it is accurate. That being said, mine while accurate according to the boiling test, is about 20 degrees cooler than my grate temp. My Maverick ET732 has also been boiling water tested. I just take it as it is. I am cooking with my grate temps now ...
    A walking contradiction, partly truth and partly fiction....

    18.5" modded WSM, Maverick ET732
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  9. #9
    TVWBB Member Marty W's Avatar
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    I agree with everyone in that mine is dome temp runs anywhere from 15-20 degrees cooler then my cooking grate. However, I only have one cook in on my WSM so time will tell.
    Weber 22.5 OTS w/Smokenator - WSM 22.5

  10. #10
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    Jason, thanks. Did this test, and while it read the boiling water at 212 when running a probe yesterday, the stock therm was anywhere from 10-30 degrees lower than the grate temp (depending on how high the temps were).

    thanks again to everyone for responding!

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