Some data from the differential pressure measurement. Finally got it running, seems to be making sense. The sensor is not designed for water (I am skint) but I don't need the water in direct contact to get a reading and I am able to log it.
I am deliberately showing raw data, it gives a good idea of my noise levels. With averaging this can be cleaned up a bit. Note the increase in noise above 4lpm, this is the Hydor L30 which is rattling, it is very visible in the pressure drop measurement.
Also note that this (the dP) is not calibrated, it is the nominal transfer curve of the differential pressure sensor with an offset. I am using a low resolution DAQ channel for convenience, I think it is sufficient, gives me ~0.13kPa resolution (0.013m H2O).
No major clashes with existing data for this block I think.
