This device fit inside a machined metal tube to be lowered into natural gas wells with pressures up to 20,000 PSI and temperatures to 150ºC. It recorded pressure with the accuracy of 0.021% F.S. (Full Scale) and resolution of 0.0003% F.S..
I designed it this device with a 24 delta sigma converter. Careful calibration procedure was used to achieve the required accuracy.
I completed the design of the electronics, prepared schematics PCB and completed the firmware for this device.