Page 3There are other tank testing units, altho not really as desirable as Analox’s - unless one just cannot justify that much for personal trips. The Pocket CO will work and is available for $129 including US shipping at Pocket CO Carbon Monoxide Detector - Marv Golden Pilot Supplies. If I really liked it, I would not also own the Analox - but you can certainly use it for safety, and it's easy enough for a couple of divers. Here are my cautions and how-tos from my experiences and mistakes...
1: It is susceptible to contamination and misreadings from humidity and a variety of urban fumes, so stick it in a ziplock before you leave the plane and keep it in one. (I do wear mine turned on while sleeping on planes since none have their own and I think it'd be nice for someone to know if an onboard problem happens.)
2: Use slider, freezer grade gallon bags as they are easier to close, but take enough for a new one/day as they still tend to leak after handling.
3: Turn on the unit and crack the tank before sticking the bag to it less you learn how easy it is to blow one overboard if you hold the bag to the tank then open! That's how I learned. :blush:
4: When the bag is mostly full, close it, turn off the hissing tank, and start your stopwatch/SS timer. Wait 90 seconds or longer and read.
After your first trip, order the calibration kit in time to use it before your next. $39 plus shipping at Order the Pocket CO - Carbon Monoxide Detector Re-cal every 6 months for maximum accuracy. The can is only good for a year and 3 uses anyway, then replace.
The ToxiRAE 3 can be rigged to hook up to a low pressure hose for less than an Analox, or used in a slider bag for not much more than the Pocket CO with a fast response time, but I do not have a lot of info on it. It’s a viable choice, but I don’t like having to hook up a reg before testing and for a bag test unit - I can’t wear it discreetly on a plane or in a café. :crafty:
At what level do you refuse to breathe a tank? Pick a number between 3 & 15 - ppm, not % - then stick to it. Of the countries that do have regs, enforced or not, that's the range. Your call. For me now, I start complaining when I see 3 and getting off of the boat at 10. Some are less accepting of 3 to 5 ppm readings.
Ok, so what if you check every tank all week of a trip and get nothing. Haha, that did happen to me on my last trip after complaining to the operator about readings on my previous visit, so they do listen - and she was using a different provider. I was bored, but reassured, and kept testing. The first time you see 5-10 ppm should get your attention, more so for more. Next trip, same operator - who knows? See www.scubaboard.com/forums/basic-scuba-discussions/412257-so-do-you-get-bored-checking-tanks-co-when-you-never-get-readings.html
Am I a fanatic a about CO elsewhere in life? Well sure I am. My FB friends will confirm that easily. :laughing: For millennia of home, dugout or cave heating we coped with bad air trying to not kill ourselves, easiest in our sleep - but in recent decades home monitors have become so very cheap. People still die in every state so leaders and some legislatures are still trying to get a monitor in every home, but I like one in every bedroom, office, warehouse, café, vehicle, hotel room, etc. - and will carry my own anywhere. Not a problem at all. Lightweight and did I mention cheap…?
For divers, not so cheap - but until we can get all operators to take affordable actions to provide us with safe tanks, for the next couple of years at least - protect yourself…!!
Oh, and it does come up now and then about what my financial interest is in this? None, zilch, nada at all. I’ve spent more on this than I wanted to, but glad I did. :eyebrow:
This thread was selected by SB Members as the "Thread of the Month" for March, 2012