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Hygrometer Insert for 85mm Mason Jars (FreeCAD) — image 1
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Hygrometer Insert for 85mm Mason Jars (FreeCAD)

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Replaces the metal insert in the jar's lid. Fits a Ball jar containing a quart.

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Model information

Category
Kitchen
License
Creative Commons — Public Domain

If you want to store things like cigars that need a specific humidity, using those one quart Ball jars is a nice option. With this mod and a few cheap hygrometers (https://amzn.to/46ZqGaw) it's easy to monitor the humidity in your jars.

I printed this in PETG as I hope that the material's elasticity will help with creating a proper seal. Some kind of TPU might be even better, but I didn't have any.

While this is not a remix (I created the model myself), I shamelessly stole the idea from this model: https://www.printables.com/model/497113-hygrometer-lid-for-mason-jars

You must make sure that the lid stays airtight! It is a good idea to seal the slit between hygrometer and lid using a generous amount of hot glue or silicone.

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