wiring up my lm34's is producing varying results.
taping together all 3 leads results in a voltage varying enough to fluctuate Farenheit temps about 10-15 degrees.
You do have all 3 seperated right? not just soldered, then taped up? If using tape, wrap each solder connection independently then once covered, you can wrap them together. If using shrink, Use the tiny stuff to shrink each connection independently, then a bigger size to bring them all togehter.
Sorry if this seems obvious, but Obvious is usually the overlooked.
sorry if this sounds ignorant but this stuff is foreign to me.
Ok so here is the question. If i found out what thermistor my digital therm uses, could i make multiple probes from that using 3.5 mm jacks off of old headphones?
just so i understand- the SS tube is open on both ends (like a straw)? so the only thing sealing both ends is hte epoxy that has filled the tube, correct?
i would like to use this idea to waterproof a love temp probe for fermentation control.
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(dē-fěn'ĭ-strāt') To throw out of a window.
Before I saw this thread, I was doing the same thing, but with a bit of brass tubing from the hobby store. Epoxy both ends, sand smooth - brass was easy to find and does well with temperature transmission too. In my case, it never touches beer, it's sitting in a fermentation water bath.
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It must be understood that common sense and caution are factors which cannot be built into this product and must be supplied by the operator.
If you were to do this with an existing Ranco probe would you heat shrink wrap the wire probe also ( or the portion you would submerse)?
I can buy 1/4" copper tubing at local hardware store. Has anyone successfully got the probe in 1/4" tubing? I noticed JB weld has a water weld product is their any reason not to use that as opposed to the "regular" version you mix? Lastly if you wanted to remove the probe eventually would you just methodically pick at the epoxy or is it pretty much a permanent mod?
Shouldn't have to shrink-wrap the tube, as the probe itself is buried in the tubing, and the epoxy is sealing both ends -
not sure about Question #2 - 1/4" tubing, but they have many sizes with 1/32 or even 1/64 ranges at the hobby shop...
I think regular JB is waterproof -
I consider it permanent. If I wanted to replace the probe, I'd go back up the line to the controller box and replace it.
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It must be understood that common sense and caution are factors which cannot be built into this product and must be supplied by the operator.
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