We use the MS5803-14Ba pressure sensor for the OpenCTD, which comes in a nice, easy breakout board from Sparkfun. Unfortunately, it seems like all the development for this board has been focused on Arduino and I was struggling to find a working python implementation for the RP2040.
For anyone looking to integrate these little pressure sensors into their platforms, we kludged together a basic CircuitPython library to get them running on the Adalogger: OpenCTD/Software/Firmware/OpenCTD_RP2040 at main · OceanographyforEveryone/OpenCTD · GitHub