Warning levels and alarm instrumentation for carbon monoxide in the atmosphere.
D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis*; D008452:Maximum Allowable Concentration; D009787:Occupational Medicine / Q000295:instrumentation*
D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D002248:Carbon Monoxide