I am very interested in trying a load cell to monitor the level of propane in a 300 lb cylinder, but that's a project for a different day. I am curious though, if folks have real experience with a permanently installed load cell under a heavy load. Without the ability to zero it out once in a while, does it still provide usable, accurate weight readings month after month, year after year? In weather?
For a load cell subjected to the elements
This has a range of 0 to 1.45 PSI or 0 to 1019mm of water. Connect a tube to the port and anchor it to the bottom of the tank and it will have a 0 to 5V output based on the water level.