I'm starting out on making a differential air pressure measuring circuit
I was wondering if this sensitivity can be reduced as much as possible.
the sensor itself needs to be in the same chamber as one of the two pressures.
absolute pressure ? as referenced to ?The internal sealed 2nd pressure port is evacuated to as perfect a vacuum as possible, so it's port is measuring applied pressure to the exposed port relative to absolute zero pressure.the so-called one sided measurement is referenced ambient pressure.Yes, the internal 2nd pressure port is exposed to ambient pressure but not available to the user, often called a gauge pressure measurement.put it on a plane or in a barometric chamber and in both cases it will read zero.put it on a plane and connect it to the outside of the plane and the pressurized cabin will only effect one side of the sensor. odd'ly, the side NOT connected to the tubing.all a differential pressure device has is a second connection port.you put that sensor in a waterproof box, add a house for the box area and a second one to the connection and you have created a differential pressure sensor.a Bordon tube is a perfect example. the atmosphere in which the device is placed is the reference pressure. the tubing is connected to a separate environment.
Your sensor is an absolute pressure sensor, it is not suitable for differential pressure measurement. You need a differential pressure sensor.
If anyone has used this/know about this sensor,if I have a pressure difference of say 0.1 or 0.001 kPa,will it be able to detect it?
So be sure to use Vcc as your ADC reference, and not a precision voltage reference.
And power the sensor from same Vcc?