OK, now I have another question which the moderators may move to a different thread. Are any of the O2 analyzers waterproof? What happens if you take them onboard and they fall overboard into the ocean? Or your divemaster, in an effort to provide excellent service, takes all of your stuff and jams them into your dive bag and dumps the entire bag into a rinse tank? Or after you have been diving at one shop where you rinsed and dried your stuff so you would make weight getting on the airplane and then took a taxi back to your hotel, the taxi driver, without saying anything, immediately takes everything out of the trunk and runs off and dumps everything in the rinse tank at the hotel? What would happen to the O2 analyzer in those situations?