Use of VW Polo expansion tank

I see there are some that have changed the coolant tank to that from a VW Polo for better reliability. I also note that the Polo tank has some sort of low level warning connection.



Can anyone advise if this electrical connection utilises a float or conductance probes?



Can it be used on a F/TF fitted with a low level (B&G or MGR float type) sensor kit or similar?



If conductance is there a standard electronic kit that could be adapted?



Ta.

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