According to the datasheet for the MPX53DP differential pressure sensor, the output voltage should be in the range of 20-80mV, proportional to the differential pressure.
I have set it up with a 3.3v power supply and was expecting to need an amplifying circuit but at a differential pressure of 0 (both nozzles are open), the output voltage is 1.75V. However, when I apply pressure, the voltage rises as expected in the datasheet.
So my question is this: How do I have an offset of 1.75V when it should be 0.02V?
Thank you in advance for your help