You are looking for a "pressure transducer". These are not inexpensive items at the pressure of the FRC system so expect to spend over $100 for each sensor. I did a quick search and found a
unit on McMaster-Carr for $170. This is by no means a parts recommendation, it's just for reference. Pneuaire has some SMC
units, but they are only rated to 75psi proof pressure. I hope this helps!
Remember to verify the pressure rating and follow the rules carefully for pneumatics component selection when they come out next year.
Coding would be very straightforward in LabVIEW. You may need to make a custom circuit to interpret the output and power the sensor.