Salt dehumidifier

thingiverse

This is a salt dehumidifier for storage boxes. Normally when I put things away for storage in the garage or in the attic, I put my stuff in a plastic box with lid and then I put in a small can with some calcium-chloride salt. This is great at keeping the air inside the box at a low humidity and the stuff in the box free of mold. However metal cans and salt is not great together so I made this plastic salt container. It has a top and a bottom. The top contains the salt that absorbs the humidity in the air. It has a small hole in the bottom so water can drip down in the bottom part. The two parts are sealed with a O-ring and held together with three M4 screws and can be separated so you can empty out the water when it is full. Note. The size of the holes are made for a brass insert. I will publish a version with smaller holes shortly. Update. I have uploaded a file with bolt M4 screw sized holes, so now you can, in theory, just print the water container and screw in a M4 screw. update_2 I have added a picture of how much water there is in the water container after about two months. The dehumidifier was in a box with lid that was standing in relative dry garage. No heat but ventilation. Update_3 This thing is now obsolete. See version 2 here: http://www.thingiverse.com/thing:1391314