Which one would you trust ?

[Jerry045]

Since many years I use a temperature probe to check the flue temperature for my Jotul combifire #4. I try to maintain the temp near 400F or more, to reduce creosote. Two years ago I cleaned the probe and since that time, the readings appeared to have somewhat changed. So yesterday I bought a new probe and check its performance against the old one. Well there were differences in readings.
On the new one, I got readings around 700F and when I replaced it with the old one, I read something like a bit more 400F; true between the exchange the flue temp may have dropped a bit, say to 600F or so. But this is quite a difference to me. I am more leaning to trust the new one. Am I right ?



Jerry

 

[tfdchief]

I agree, probably more trust in the new one simply because it is new. However, with that much difference, I wouldn't trust either one very much. I would gladly pay more for a stove pipe probe thermometer that I knew was accurate. There are quite a few threads on this forum on the topic if you wish to read more. Just do a search. Here is one - https://www.hearth.com/talk/threads...dar-probe-flue-thermometer.78251/#post-998275

 

[begreen]

Hard to say but I would probably go by the new one as well. This is on double wall pipe, right?