Flexible water tank - gauge?

[Aldis]

Hi,

I am trying to find a way to install some sort of gauge for my flexible water tanks (2x220l). Is there a system that would be able to measure the water level in such bladders?

Thanks!

[Kelkara]

I estimate how much water is in my tanks by knowing how much water is in a full tank, and using a flow meter to measure how much water leaves the tank ... not 100% accurate, but gives a good estimate.

[capt jgw]

I take it the tanks are installed somewhere you can't see them? The only way I know of is to see how flat they look or poke a finger to see how firm they are. The only one I've had was a waste tank hanging vertically in a locker. I could tell how full by seeing how far it bulged out from the bulkhead.

[deblen]

No personal experience with these.
https://www.amazon.com/stores/Toparg...B?ref_=ast_bln