I think these books are someone’s phd, probably no pde.s other than in published papers, someone’s desertation, and generic (non diving related) engineering text books- A book about oxygen sensors, including oxygen cells, and solenoids
- Even engineering manuals (both rebreathers and OC regulators, and even oxygen sensors); yes, I want to see partial differential equations and integrals
Chemistry of o2 cells isn’t my favorite niche so I haven’t chased after it that much but probably the dude that rund oxygen scientific (from Austria) has some papers published about that
I do share the hope of getting access in that corner of knowledge that you described, let’s keep looking