Hi,
As I have no idea how to fit a float that monitors both tanks so I think I will mount two thru reservoir tank optical sensors? Cheap. negligible displacement of fluid in reservoir.
I have seen some Triumph Toledo twin line systems with two Single Pole Change Over Contacts pressure switches mounted on the hydraulic lines and wired to illuminate a Warning light. A shame 100Bar pressure sensors are not cheap.
No Rush as haven't seen my car for a year & a Half.
Cheers,
Iain.