i guess i should have chosen my words better. but my feeling would be the same. if you cant trust the company/crew/liveaboard etc to provide a proper analyzer, why would you dive with that outfit?Don't have a choice to change once you're on the boat
i suppose the reality is that some will bring their own, some will use the one onboard. so i am sure there will be more than one avail and the divers would quickly realize if there were varying results from the different analyzers and whether they can trust the operators results.