I need a pressure regulator, but I don't know what kind?
I want to be able to control the pressure of air in a small, closed environment. The closed volume is no more than 250 ml, or a cup. I have a 100 psi air source available and I want to be able to adjust the pressure in the closed environment within the range of 0 - 45 psi. It is not necessary for me to know the true pressure (though that would be useful).
I don't know what sort of pressure stability to ask for. It will depend on how much more expensive +/- 1 psi vs +/- 0.1 psi is. Any electronics should be self-contained. A computer connection may provided, but must not be mandatory
What sort of a regulator am I looking for?