As danw2 stated if you can keep the cryogenic liquid from touching the sensor they typically will function because they wont get down to the actual Cryo fluid temperature. I have seen the setup danw2 shows and I have seen users install what's called a dry leg or pigtail device. Data sheet for...
Do you know the failure mode of the pressure sensors?? Are they plugging up or completely failing? If this is a open tank, meaning its not pressurized and is open to atmosphere, you could use a pressure/ level sensor threaded it into the side of that tube (Down near Point A) and it will give you...
