Has anyone found, or built, a water pressure sensor for ST? I have a pressure reducing valve on my house and I would like to monitor pressure vs. time to see if it is consistent (for the purposes of setting the pre-charge on an expansion tank). I could obviously do this manually, but where is the fun in that? 
Plus, I don’t want to get up in the middle of the night, or go home during the day, to take readings.
I am also interested in this.