Propane Tank (or any Tank/Container) Indicator Tag

thingiverse

I wanted an easy to install and easy to read tag so I could tell with a glance from across my deck which of my propane tanks were full, in use, or empty. I could have made paper tags and written each tank's status but I figured a 3D printed tag would be easier to read from a distance and easy to change as each tank was used up. It was also a useful and enjoyable design challenge for me in TinkerCAD. This concept can be used for any tank or container you feel appropriate. The front disk and the three indicator markers are printed upside down so that when flipped over upon installation, the alignment dots work right.