The lithium hydroxide cartridges are of a larger diameter as compared to the much more common Extend-air slaked calcium hydroxide units. The LiOH cartridges are MUCH more expensive with a proportionally extended duration time. As a by-product, they produce a lot of heat. In addition to the downside of the cost, exposure to water makes them flammable/explosive. The other cartridges can be acquired through many SCUBA shops. R/Jay From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of David Bartsch Just a note...Lithium Hydroxide canisters were aboard my submarine in case of emergencies. I would assume that the navy did extensive research and found these to be the best purchase for the limited space available. |