Old pipe was 2", new pipe is 3". Locations shouldn't make a difference its measuring the Mass of Air or the density over a given interval. Yes the air will flow slower at the bottom of the pipe as opposed to the top but I"m certain this will have little or no effect on the sensor's function. The pic is deceiving its mounted at about 15 degrees on the bend.
If its returning incorrect values I can easily make a new one and move the location closer to the lid
If its returning incorrect values I can easily make a new one and move the location closer to the lid