I have a yacht with four existing tanks - all with VDO capacitive tank senders (0-20mA).
These senders have only two wires - Sense and Ground.
Here is some information on the sender and connection to the analog meter.
https://www.dynamicelements.co.za/blog/fresh-water-level-sensor-n02-240-802-wiring-and-setup-n31
I am strugling with the wiring on this one and not even sure they can be used with GX Tank 140, but if anyone can help that would be great.
As a side note, I would obviously prefer not to replace all the working senders, but if I need to what are people using?
Thanks
Craig