We are using the pressure sensor exactly for its intended application, water level measurement in a tank. The tank is about 15cm high and the sensor works fine, with about 1mm precision (even more than we need for the application). We used an arrangment like the 'washing machine' application note, with a dip tube in the tank from above. We are with the opening at about 1.5-2mm from the bottom (the exact level is software calibrated)
There is an issue however: if some liquid enters in the tube obviously the measurement is wrong. The 4-2.7mm PU flexible tubing from the sensor directly in the liquid almost immediately 'sucks' some water for capillarity or thermal expansion so we used some fittings and go to a 8-6mm PA tube for the final dip section. It works mostly fine but, occasionally, a big drop will still cling to the opening and mess up the measurement until shaked down (or until it evaporated).
Is there some trick to make it work correctly?
