I bought the same one off amazon and have used in quite a bit. It is pretty accurate (within a degree of two), cheap, easy to use, and also makes a great cat toy
. I use it a lot for cold side temp readings when I don't want to be sticking things in my wort or beer anymore but don't need a super accurate reading. Ferm temps (to check that my controller is correct), checking the wort when cooling, checking starter temps when cooling, etc. For $15 it has been very handy. It doesn't how every work well on the mash or hot side stuff.
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