Hi, I would appreciate some help in order to reach the following configuration:

I have 2 level sensors in my fresh water tank:
- first one is on the top of the tank (tank is full)
- second one is on the bottom (tank is empty)

What I want is that osmosis is activated only when the second level triggers (ie when the tank is empty). And off course cut when the first one say that the tank is full.
It means that the first one should not trigger the osmosis alone. To have the osmosis works, it means that both levels should be on. However only the first one will off the osmosis.
Is it possible to get that?
Thanks!

Christophe