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Old 01-30-2014, 11:36 PM   #1
cheyneco
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Default Bottle carbing gauge/cap

Does such a thing exist? A gauge similar to what you would use on a keg, but fixed to a reusable bottle cap. This way you can accurately monitor carbonation levels without popping bottles everyday or relying on the plastic bottle guess test.

A more crude cap could actually be a disposable bottle cap with a pressure activated indicator...sort of like a turkey pop up timer. You could buy caps rated for different carb levels.

If no such thing exists...I want the first one free for whoever takes my idea and invents it. Thanks!

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Old 01-31-2014, 12:22 AM   #2
thadass
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Somebody has made one of these to monitor PSI levels in a plastic bottle as an experiment, but the important thing is:
the PSI in the bottle is not going to peak when carbonation in the liquid it peaked. The PSI in the bottle increases as the headspace pressurizes with CO2 and then PSI _decreases_ as it's absorbed into the liquid.

With a sensitive enough gauge it'd possibly show you when the liquid has absorbed the CO2 based on the pressure having lowered and stabilized, but it would only be slightly more useful than the plastic bottle test and really would best be done using a plastic bottle anyways.
There's no simple way to have a turkey pop-up timer style indicator as there's no linear correlation of bottle pressure to liquid carbonation, especially since different carbonation temperatures will influence the absorption rate of the liquid over time, so the same batch carbonated at different temperatures would have completely different PSI levels in the bottles even if the final product is exactly the same but some just took longer.

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Old 01-31-2014, 02:06 AM   #3
mdabbles
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Strangely enough, I was thinking of the same thing just the other day.

Sent from my mobile.

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Old 01-31-2014, 02:07 AM   #4
cheyneco
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Thanks for the explanation. Makes sense

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