You can’t adjust psi with a titan, only flow. I wouldn’t consider a titan a standard CO2 regulator. They’re great for the grow room though.
Regular CO2 regulators can be used with a CO2 regulator to nitrogen tank adapter. Only makes sense if you have a CO2 regulator on hand though as there’s not much of a cost difference for CO2 vs nitrogen regulators. You will also still need to pair it with a flow meter. They make regulator/flow meter combos but the ones that actually regulate psi aren’t cheap.