I like Fluke 6270A Pressure controller best .Easy to learn and use. You can purchase uptown 5 various size pressure modules to put inside with the ranges you desire up to 1000 psi. I have a barametric, 5 psig, 50 psia and 500 psi module in my 6270A. I have also other Fluke pressure controllers PPCH, PPC4, PG7100 and had Cheaper Handheld pumps such as Druck DPI 610 which I like better than Flukes handhelds. Depends on your accuracy.
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