I'm currently using two MP3H6115a to meassure differential pressure. I'm using this pressure to calculate air speed.
The problem is, that my differential pressure is not constant over time. I've been evaluated the sensors today after having problem with the speed. I've been having the sensors on my desk all day, writing down the estimated pressure from respective sensor, and over time the difference vary from 0.05kPa to 0.01kPa. The frequency of the change is very slow, and it have been constant for long periods (~2h).
Maybe worth noting is that the pressure has been falling all day.
Does anyone have experience on the matter? Is this to be expected?