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Sorry. Double post.

This was essentially my concern in the question I asked above. If you're sanitizing all of the bottles the same way, then there is something lurking in the bottles. That thing might be an infection, which is what I was asking about with the treatment, or it can be a residue of something like...

Ah-ha, this is a light-bulb moment! This explains in-part why people on these forums seem to be so reluctant to just toss on another temperature probe when they're getting mixed results. I get my thermocouples 2 for $5 and coming from a data acquision background I don't think twice about...

Ah. I missed the 90 minute part.

Didn't you say that you also lost 2.5 gal on your trial run? What has improved?

Measure with a micrometer, mark with chalk, cut with an axe. Your PID controller isn't going to be precise enough to matter what kind of temperature probe you get so going and buying the most expensive one doesn't make much sense. It is actually more important that your thermometer respond...

I had a similar problem with a recent batch with bottles to bottle consistency. I eventually came to the realization the the bottles I had previously used for homebrew were the only ones affected. All the new bottles were fine. This is where I think it being your second brew might be the...

Unlikely, but it might be worth the experiment especially if you have a spare bucket sitting around. It definitely won't save you time, but it may save a gallon or two of water which is eco-friendly if you're into that sort of thing or forced to in certain localities. As a few other tips...

In the winter you have the perfect heat rejection system waiting for you. Coming up with 88 lbs of ice should also prove to be relatively easy and cheap.

Yeah. You're looking at 1 lb of ice for every 1 lb of near-boiling wort. For 11 gallons, that is 88 lbs of ice.

Also, how are you rejecting heat from the system?

Can't you combine the top two buckets and remove the immersion chiller from the loop?

The idea isn't a bad one but I think your order of operations is backwards. You generally want to provide your greatest delta-T to your least efficient heat exchanger. Then you can use the somewhat diminished delta-T on your more efficient exchanger. In this case it means filling your...

In the US, "20 pound" propane tanks that you swap at the store have been coming with 12 lbs of propane in them for at least 5 years now.

I'm not saying it isn't possible to with the equipment. I'm saying that he measured one parameter incorrectly, so something is suspect here. I'm trying to help him figure out which one.

Water and wort won't boil off at the same rate, though I don't know that you'll get that big of a difference. Your boil-off rate is most affected by the diameter of your pot and the amount of energy you're putting into the pot. If you used 14% of 12 lbs of propane, that is roughly 36,000 BTUs...

Palmer attributes this sometimes to poor aeration prior to pitching. Does that seem like a possibility?

+ 5.5 gal Ed Wort's Hefeweizen = 10,083

My original question was asking if the thermometer technology was limiting in some way as I've never personally used an RTD. I wasn't interested in NIST tracibility.

That is not what I thought you meant when I read the article. Thanks for clarifying.