Hmmm ...
The illution that this would be an exiting 20 dollar project made up of a small circuit board in a plastic container is starting to fade away...
It is starting to look like a multi hundred (if that is a word) dollar project that would be stretching over several months.
There is no way that my boss will let me do this. Even if I do the developement in my spare time and for free.
Only the parts themselves will be way over the cost of us manually messuring the tanks.
This looked all so easy, sitting bored one night at work 