I have a workshop started with a fairly substantial poured concrete foundation into which I placed two parallel flue paths made from concrete flue blocks lying horizontally. The first stage of RMH experimentation will use firebrick construction of combustion chamber and heat riser, covered with cob and a 55 gal. barrel I still have some concrete to pour for the pad covering the flueblock channels. This is the stage at which I might embed k-type thermocouple probes in the masonry mass to check the temperature at various places. I'm looking for a good, reasonably priced temperature measuring device that would accept a wire type K probe. I figure 3 or 4 probes left in place will be plenty, and only the first one will need to handle high temps. I need to find out what kind of heat I would be subjecting the flueblock and concrete to, so I could make decisions about lining the flue, if necessary. Long term, I'd guess that I would replace the firebrick with a cast refactory firebox and primary flue, but that would be after learning how much heat I can store and what kind of improvements I might need to make in the flue through the thermal mass. Right now, my question is: what's a good meter in the $20 to $40 price range. Suggestions of specific type K probes are welcome, too. Thanks.
You can also search for in floor heating system remotes on ebay, have found some that way, and the temp range will prob be fine on the flue, just not the riser.
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posted 6 years ago
Thanks, Morgan. I didn't find the specific meters you suggested, but learned some more while looking for them. Received a Nicety DT804A this morning, and I've been using the Jotul in my kitchen to compare the readings from the two low-temp probes supplied and the extra high-temp probe I ordered. Overall, I think this will be a very useful tool. I appreciate your input.
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