1. A device (10) for dispensing oxygen (30) under pressure comprising a canister (12) filled with at least 40% activated carbon (14), by volume, and oxygen (30) at a pressure of between 4 and 17 barg, when measured at room temperature, which canister is sealed with a valve assembly (18) allowing release of oxygen from the canister on actuation of the valve assembly, characterised in that the device further comprises a catalyst (16) that prevents or significantly reduces the presence of carbon monoxide.
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