The fluid conductivity changes during the measurements, is that a problem?
Actually changing conductivities can compromise the result. Especially when the fluids with the different conductivities do not mix with each other because of different viscosity.
We have observed that the sensor needs 20 sec or more to become „accustomed“ to the new conditions. After that period of conditioning the result will be fine.
In short, rapid changes of liquids with changing conductivity will be a problem. The longer the cycle the better.