Why use a prepacked cartridge CO2 absorbent instead of loose granular?

The Poseidon rebreather is designed to use the Sofnodive 797 cartridge CO2 absorbent manufactured by Molecular Products. Cartridges solve many of the problems associated with traditional loose granular carbon dioxide absorbent. The cartridge absorbent uses the same chemistry as loose granular absorbent but in the form of easy-to-use cartridges that are quickly loaded into the scrubber canister. The individually sealed cartridges need only be opened immediately prior to use and are date stamped to assure freshness. Cartridges eliminate problems of channeling and duration variability associated with granular absorbents because they eliminate both settling and individual differences in canister filling technique, delivering more consistent performance.

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