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2. Oxygen scavenger - Wikipedia

   en.wikipedia.org/wiki/Oxygen_scavenger

   An oxygen absorber The contents of an oxygen absorber from a packet of beef jerky. Oxygen scavengers or oxygen absorbers are added to enclosed packaging to help remove or decrease the level of oxygen in the package. They are used to help maintain product safety and extend shelf life. [1] There are many types of oxygen absorbers available to ...

3. Rebreather - Wikipedia

   en.wikipedia.org/wiki/Rebreather

   A store of oxygen, usually as compressed gas in a high pressure cylinder, but sometimes as liquid oxygen, that feeds gaseous oxygen into the ambient pressure breathing volume, either continuously, or when the user operates the oxygen addition valve, or via a demand valve in an oxygen rebreather, when the volume of gas in the breathing circuit ...

4. Scavenger (chemistry) - Wikipedia

   en.wikipedia.org/wiki/Scavenger_(chemistry)

   Oxygen scavengers or oxygen absorbers are small sachets or self adhesive labels that are placed inside modified atmosphere packs to help extend product life (notably cooked meats) and help improve product appearance. They work by absorbing any oxygen left in the pack by oxidation of the iron powder contained in the sachet/label. [1]

5. Self-contained self-rescue device - Wikipedia

   en.wikipedia.org/wiki/Self-contained_self-rescue...

   Test bench for a miner's closed circuit self-rescuers. A self-contained self-rescue device, SCSR, self-contained self-rescuer, or air pack is a type of closed-circuit SCBA [1] with a portable oxygen source for providing breathable air when the surrounding atmosphere lacks oxygen or is contaminated with toxic gases, e.g. carbon monoxide.

6. Active packaging - Wikipedia

   en.wikipedia.org/wiki/Active_packaging

   Oxygen scavengers or oxygen absorbers help remove oxygen from a closed package. Oxygen causes acceleration of product degradation and oxidation of e.g. vitamins and fats by stimulating microbial activity. [7] As a result, poor taste, bad odor, discoloration and nutrient degradation may be the consequences.

7. Oxygen breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Oxygen_Breathing_Apparatus

   A sodium chlorate oxygen candle in the base of the unit generates oxygen on start-up as the canister has to reach a high internal temperature before it will start generating oxygen. The circulation of exhaled air containing carbon dioxide through the canister starts the chemical process, usually taking less than five minutes to reach a stable ...