Peumatic Pressure Meter for Practice

Has anyone seen or know where to find a part like this? I want to use a small pressure meter to show real time psi for our pneumatics during practice to optimize our pneumatic systems. We would take it off for a competition.
I have looked around online a little bit but am having a hard time finding something that will work for such a small system.

Let me know if you find anything.
Thank you!

Check at SMC the manufacturer of the pneumatics parts. There are a variety of sensors for you. Do you want to program it or just watch it?

I just want to watch it.

And watch the money leave your bank account! $100 for one of those digital sensors. Yikes!