Oxygen (O2) Sensor, Multi Meter 4R
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Maintaining awareness of oxygen levels is paramount to safety. Oxygen (O2) depletion is the most acutely fatal gas threat personnel face and can be caused by a number of factors, including displacement by a heavier gas such as carbon monoxide, or by combustion, including otherwise harmless processes, such as rust. Oxygen enrichment also poses a potential threat because it increases the possibility of combustion and oxidation.