CO and CO2 sensors

Despite the many similarities, there are also many differences between carbon dioxide and carbon monoxide. They are often understandably mistaken as the same gas, however, the distinction between them is crucial when it comes to gas sensing.

What is Carbon Dioxide?

Carbon Dioxide (CO2) is a chemical compound consisting of one carbon atom and two oxygen atoms. It is a colourless and odourless gas at room temperature and is present in the Earth’s atmosphere at a low concentration. CO2 enters the atmosphere through the respiration of organisms, the decomposition of organic matter, the burning of fossil fuels and fermentation. It is taken in by plants through the process of photosynthesis and can be harmful to the environment as it is a greenhouse gas which traps heat energy within the earth’s atmosphere and contributes towards global warming. Some of the main uses of CO2 include freezing food, carbonating beverages, extinguishing fires, and various uses in agricultural and medical applications.

Find out more about carbon dioxide.

What is Carbon Monoxide?

Carbon Monoxide (CO) is a chemical compound which contains one carbon atom and one oxygen atom and is also a colourless and odourless gas. Unlike CO2, it is entirely human-made and is not naturally present in the atmosphere. It is produced during the incomplete burning of organic matter, which can occur from motor vehicles, heaters, or cooking equipment that run on carbon-based fuels. CO is therefore spatially variable and short lived in the atmosphere, where it has a role in forming ozone at a ground level. When carbon monoxide is present in concentrations greater than 35 ppm it is toxic to humans and animals, as it prevents the blood from carrying oxygen.

Find out more about carbon monoxide.

What are the main uses of carbon dioxide and carbon monoxide detection?

Carbon Dioxide sensing is crucial for a number of different industries, including HVAC, landfill, horticulture, controlled atmosphere storage and packaging, metal heat treatments, TOC and many more.  Each of these applications would not be possible without precise CO2 measurement. If you are interested in finding out more about specific applications of CO2 sensing, why not have a browse of the following articles…

Carbon Monoxide sensing using a CO sensor is equally important because detection cannot be done by vision or smell alone. It is necessary because it can prevent carbon monoxide poisoning which can cause loss of consciousness, seizures of even deaths. Furthermore, CO sensing takes place across a number of other applications, which you can read about by following the links below.

What is the difference between carbon dioxide and carbon monoxide sensing?

The detection of the two gases differ because CO2 detectors commonly use infrared sensors, while CO identification uses electrochemical sensors. However, CO can also be detected using NDIR sensing.

Despite the fact that CO2 and CO is difficult to detect, Edinburgh Sensors’ range of sensors allow the gas to be strongly absorbed using non-dispersive infrared (NDIR) technology. NDIR sensors offer highly sensitive CO2 detection because the gas can absorb infrared light very strongly and has characteristic fingerprint signals for unambiguous identification so even trace amounts of gas can be detected. Find out more about non-dispersive infrared gas detection here.

Edinburgh Sensors’ CO2 and CO2 detectors

At Edinburgh Sensors, we are the market leaders with over forty years’ experience developing highly sensitive, rapid response near-infrared sensors for detection of carbon dioxide and carbon monoxide.

Depending on the exact needs, Edinburgh Sensors offers a range of sensors for CO2 / CO measurement, including the Gascard NG, Chillgard NG, Guardian NG, Boxed Gascard, IRgaskiT, and Gascheck. Of these, the Gascard NG offers a huge amount of flexibility in its set-up, monitoring options and integration into connected systems.

Follow the links below to find out more about each of these sensors.

carbon monoxide and carbon dioxide detectors | CO and CO2 alarms

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