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Old 03-25-2009, 05:17 PM   #11
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Well, I never expected so many posts claiming 1 degree off. I may have to buy some and use them. I always figured they would never be that accurate.

 
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Old 03-25-2009, 06:02 PM   #12
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yes, just don't get them wet. If you're paranoid, a good strip of clear tape over it will work.

 
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Old 03-25-2009, 06:07 PM   #13
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Quote:
Originally Posted by YooperBrew View Post
It's "close enough" for me to be happy. I've found that is usually within a degree or so when I've tested it so I stopped testing it. I mean, if the fermometer says "66", even if it's wrong by two degrees either way that's fine.
I completely agree with Yooper.

I use them for "at a glance" or a "Yep - that looks about right". I have been using them for 15 years (still use my original glass fermenter) and find them to be quite reliable. Just be sure they are not in direct sunlight.
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Old 03-25-2009, 06:24 PM   #14
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I don't use one because every one (except lagers) of my beers goes into a 30 gallon swamp cooler and I keep tabs on the water so if 8-10 gallons a water are at 64 then the beer will be very very close.
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Old 03-25-2009, 06:26 PM   #15
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i think they still work after being wet, too

they look a different color, but usually you can still tell what it is trying to read

 
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Old 07-11-2009, 01:16 AM   #16
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A bit of help here from Tkach Enerteprises - makers of the Fermometer.

Product information can be found at:

Products

The product is water resistant, not water proof. Don not submerge for extended time periods (hours). Do not leave in direct sun for extended time periods.

The temperature it reads is very close to the wort temperature as described in the above link. It will always be warmer then ambient temperature because of the heat created by fermentation.

 
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Old 07-11-2009, 02:12 AM   #17
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I use them as an indicator of temp but would never trust them for exact temps. IMOP...

 
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Old 07-11-2009, 03:22 AM   #18
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I trust it, at least to gauge the difference between fermentation and still temperatures.

However, it seems like it's pretty frackin' accurate. When the thermostat is on 68F and it's been there for a while, my fermometer straight up reads 68F. 71-73F during fermentation, depending on style and yeast strain.
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Old 07-11-2009, 03:35 AM   #19
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I keep my fermenter in a water bath now and the temp is usually very close to the surrounding water temp, so I can just sample with my thermapen. However, I also have an aquarium probe thermometer that cost me about $8 that I can (and do) drop directly into the fermenter to monitor temps.

 
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