I can't find any suggestion that the Ovei pod is able to support a pressure differential in either direction. The mention of gas valves suggests that the OP may be contemplating an oxygen-rich, rather than hyperbaric, environment. Whatever is contemplated here, it should be done with care, and with a thorough understanding of all the issues and risks involved, or not done at all.
Hyperbaric is more lile pushing air into a sealed vessel. The traget pressure is 4.5 psi and I need to regulate the speed pressure increase. I found some accurate pressure sensors but I was looking to automate the speed of compression and decompression.
regulate the air flow inside the unit
pushing air into a sealed vessel.
Breathing it at only six metres could be fatal.
Perhaps the OP is trying to build a setup that will just get some fresh air (not pure O2, but just pump in air from the room the pod is sitting in) into his gaming pod.