MST Inc. (www.modsafe.com) launched a line of air purification equipment for use with supplied air respirators. The company says its Respiratory Protector Portable CO Removal Systems convert carbon monoxide (CO) into CO2 and removes other toxic gases, such as ozone, nitric oxide, sulfur dioxide, ammonia and acetone. The company uses its low temperature, LT CAT catalyst in the systems to eliminate the need for desiccant dryers and to purge moisture from the system. The company says the system produces humid air that is comfortable to breath.