The water level sensors in my motorhome are the SPE model (with 2 rods) from CBE. These sensors do not operate based on resistance but rather on voltage, ranging from 0 to 2.5 V depending on the measured capacity.
My question is: are these sensors compatible with the Cerbo?
Only just stumbled across this.
GX Tank 140 is needed as this water sensor is capacitive not resistive. Use 5v supply via the GX Tank DC input and use tank inputs 1 or 2 on GX Tank 140 within the Cerbo settings, choose voltage. Probe voltage range is 0v empty tank to 2.5v full.
Wiring colours on the SPE probe as follows:
White = +
Brown = -
Green - S
Hope that’s useful