Hello Rafael,
The display only works with the sensor 99660614000
which is installed as standard in the 996/997/991gen1 Cup.
With this you can not measure resistance values at min
and max. The sensor requires active electronics to measure
the level. The sensor has a resistance of 22 ohms at rest.
If the sensor is now immersed in oil, it still shows 22 ohms.
If they can measure different values with their sensor, it is
a different sensor and must then be exchanged for the
99660614000.
Best regards
Jürgen Albert