Carbon Monoxide

Carbon monoxide (CO) is a colorless, odorless and tasteless gas, yet very toxic to humans and animals.
It consists of one carbon atom and one oxygen atom, connected by a covalent double bond and a dative covalent bond. It is the simplest oxocarbon, and is an anhydride of formic acid.
Carbon monoxide burns with a blue flame, producing carbon dioxide. Despite its toxicity, coal gas, which was widely used before the 1960s for domestic lighting, cooking and heating, produced carbon monoxide as a byproduct.
Some processes in modern technology, such as iron smelting, still produce carbon monoxide as a byproduct.
Airmet can assist you in finding the correct carbon monoxide detector for your application. Simply use the product selector below or give us a call.
Carbon Monoxide Characteristics
CAS No. 630-08-0
Chemical formula CO
Vapour density 0.97 (air = 1)
Safe Work Australia ES TWA 30 ppm
STEL 200 ppm for 15 minutes
100 ppm for 30 minutes
60 ppm for 60 minutes
Flammable limits LEL 10.9 % by volume
UEL 74.0 % by volume
Equipment group IIB
Temperature classification T1
Chemical/physical properties Carbon monoxide is a colourless, odourless and flammable gas which burns in air with a blue flame.
Hazardous properties Carbon monoxide is thought to be the most common cause of poisoning in both industrial and domestic situations.
The toxic effects of CO are largely due to its ability to severely reduce the oxygen carrying capacity of the blood by combining more readily with haemoglobin (the substance in the blood which transports oxygen around the body) than does oxygen itself. Thus exposure to concentrations in the range of 10,000 to 40,000 ppm can cause death within a few minutes and exposure to concentrations as low as 1,000 ppm, under certain conditions, can be fatal within 10 to 45 minutes. Concentrations greater than 400 ppm can have serious health effects, especially for people with known or latent cardiovascular problems.
Occurrence/Uses CO is produced when fuels containing carbon burn incompletely. Carbon Dioxide (CO2) is the product of complete combustion but there is always a certain amount of CO produced, especially when insufficient oxygen is present.
Engine exhausts, cigarettes, gas heaters, wood fires, furnaces, kilns, foundries etc. are all sources of CO.
Detectors available Electrochemical (0 – 1,000 ppm)
Gas detector tube (5 ppm – 20% by volume)
Suggested alarm levels Lo: 30 ppm
Hi: 60 ppm


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