Manufacturer of Portable Emissions & Combustion Analyzers and Indoor Air Quality Monitors

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Carbon Monoxide (CO)

Carbon Monoxide (CO)



  • Relatively new legislation was passed in 2007 that now requires all residents of Illinois to have an operating carbon monoxide alarm within 15 feet of every room that is used for sleeping, in both homes and apartments, unless no sources of carbon monoxide are nearby which will be determined by a building commissioner. (Public Act 094-0741)
  • The Recreation Vehicle Industry Association requires all motor homes and towable recreational vehicles with portable generators to have CO detectors.
  • The Consumer Product Safety Commission advises all homes to have at least one carbon monoxide detector, preferably near the bedrooms as most CO deaths occur during sleep because people do not experience any of the symptoms they normally would if they were awake.


  • The U.S. Occupational Health and Safety (OSHA) limit for healthy workers is 50 ppm in inhaled air for up to an 8 hour period.
  • Both the EPA and ASHRAE inform that concentrations of carbon monoxide above 9 ppm for more than 8 hours at a time will affect a worker’s health.