How long time of air does this have?
The amount of time will depend on depth of course and you personal air consumtion rate. You should also realize, that your nromal airconsumption rate will most lielky only not be the case as this product is used for an emergency situation. That being said, you should be able to make a sfae asent from normal sport diving ranges with this product. There is a BIG however, to consider. I owned two of htese and returned them both as they both failed the first time they were in the water. I went to a pony bottle with an actual egulator. You can probablly bu a whole system for around $400. and I would recommend this over the Spare Air. I DO NOT rRECOMMEND THIS PRODUCT. Best of luck.
As with any gas and cylinder it depends on several things:
1) Your physical and emotional condition. How much air are you consuming?
just diving in lake looking for lost items ,depth probably no more than 30 feet, about 10 minutes. I would guess at depth, no more than 5 minutes. also note this is with someone that has pretty controlled underwater breathing. hope this helps.. it has been esp useful for those quick dives to look for a lost item (yacht club next door)
About 25 to 30 breaths at 20 feet!!
I've only used it in about 5 feet of water while lobstering and it ran out quicker than I thought it would. To its credit, I was exerting a good bit of effort chasing lobsters. However, I've always been a little nervous about how effective it would be in making an ascent from 100 feet. Another con is not being able to refill it from a tank of nitrox. Having said all of that, I would feel perfectly safe with the Spare Air 3000 in less than 50 feet. The readable pressure gauge is a must. The popup gauge is worthless.
only a few minutes at most. Different people go through air at different speeds. I have used mine about 50 times now. It is great when boating if you want to do some free diving, and is a huge hit at pool parties. I keep it strapped to my tank on longer dives just in case, but it never replaces having a guy next to you with an octo.
fully charged I got 12 breaths at 35 to 45 feet
It depends upon your depth! At the surface (1 atmosphere) you should get between 45 and 50 full breaths. At 33 fsw, you'll get only half that amount. At 66 fsw you'll get only 1/3 of that. Now, assuming you are breathing as you are ascending, you'll have to guess. Bottom line: this "bail out" bottle could easily save your life in most out-of-gas situations to depths as much as 99 fsw if you are relaxed, don't panic, and take deep, long breaths upon your ascent. Many pro divers laugh at these so-called "bail out" bottles but, again, compared to nothing, they can make the difference between living or not. Like any other equipment, you need to give them great care and keep them in good condition. Also, TSA will allow them in your luggage providing you have emptied the bottle and the top/regulator is separated from the bottle. Also, the regulator portion needs to be checked and serviced like any other regulator.
Richard Apple, PADI Open Water Instructor and Self-Reliant Diver Instructor.