Most people say to trash the thermometers...

Intheswamp

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...that are included with incubators. You know, the little glass-tubed ones with a couple of staples holding them to a plastic card along with a small glob of glue to keep the stem from sliding within the staples. They're stated as being useless, worthless and a piece of junk.

Ok, if you wanta throw them away I guess you have the right...afterall, you paid for them. But, I've got a question....

What makes them useless?

I've got two of these thermometers. One out of a Genesis 1588 and one out of a Hova 1602. Interestingly, the scales on the two thermometers are "different"....one seeming to be more compressed than the other, or is it the other one is more stretched out than the first. Hmmm.... Anyhow, the scales are noticeably different...no consistency at all. Tsk tsk tsk... Now, having said that, they also measured differently...matter of fact they were a little over two degrees off from each other! Junk, I tell ya,...junk.

Ok, so these mass produced thermometers aren't exactly "Department of Standards" precision units but all we really want to do is measure a specific temperature, it doesn't have to be accurate over a very wide range at all.

Now, there are two things I think we could do...

The first route we might could be to....

(1) Fill a glass with warm water measured with a digital medical thermometer to a temperature of 99.5F (or 102F, or 101.5F, etc.).
(2) Place the junk thermometer in the water and have the bulb of it and the tip of the medical thermometer in very close proximity to each other.
(3) Might have to warm the water up just a bit to regain the 99.5F temperature.
(4) Let the junk thermometer stabilize and remeasure with the medical thermometer
(5) Re-start the digital medical thermometer.
(6) Once the medical thermometer has stopped changing mark the level of the spirits in the stem (mark on the glass itself) with a fine point SHARPIE and note the precise digital reading of the medical thermometer.
(7) Remove the junk thermometer from the water, carefully loosen the staples and loosen the glue.
(8) Slide the stem up or down until the marked line matches up with the appropriate marking that reflects the noted medical thermometer reading.
(9) Carefully snug up the staples and put a little dab of silicone glue on the stem to hold it in place on the card.
(10) It seems that the end result should be that the "junk" thermometer should be calibrated very closely to the medical thermometer...especially if you were able to get the reading very close to your target temperature.

The second route is a little bit simpler if you can get the water temperature at your precise temperature and get the digital reading and the stem marked all at once. If you can get the thermometer marked while the spirit is at your exact preferred temperature then you can simply mark the plastic where your preferred temperature is and you don't have to worry about using the scale at all. Simply look at the thermometer and if it's at your mark then you know your on target.

Well, I'm not sure if I explained what was on my mind there or not. I tend to be able to explain things and make them clear as mud.
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Junk thermometers? Yes. No. Whatever.
You paid for'em, pitch'em or.....???

FWIW,
Ed
 
I've already had them read right than they didn't, the problem is they can't be trusted even if you 'fix' them, I don't pitch mine I use them for other things. Its digital for me and I keep 2 of those and check them against each other too just to see how accurate they are.
 
The one that came with the Hovabator 1588 was surprisingly more accurate than the others I had, must have been a fluke.

I still use 3 of various types, I get nervous I guess. I check them against my candy thermometer, which has proven to be accurate in boiling water.

Sometimes I have more thermometers than eggs!
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When I pay as much as I did for eggs, I am not going to take a chance on a junk thermometer.
I Use to hoard stuff, might use it someday. My sweet husband is teaching me to let it go. Keep quality, give away the other stuff to someone who wants or needs it.
 
Quote:
I have wondered whether these cheap thermometers might be subject to error due to the expansion/contraction of the glass.

As for digital, I think it is a good idea to keep a check on them with a medical thermometer (digital or analog). I've noticed some inconsistencies within a small group that I've had sitting on a window sill. I posted a message earlier with some observations on them...you may have already read the message. Here's the link in case you haven't read it and would like to...message link .

Best wishes,
Ed
 
Quote:
Oh, well don't let me influence you on hanging on to something that you can't use...I definitely don't want to be an enabler.
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I think all of us hold on to way too much stuff as it is.

Best wishes,
Ed
 

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