ONLINE CO2 MONITORING
Most of us know that CO2 is a colorless, odorless gas that’s soluble in water and often seen as the bubbles in fizzy drinks. But it’s also a greenhouse gas, a by-product that’s released when we burn materials containing carbon, as well as a gas formed in the respiratory and metabolic processes of living organisms, which can also be considered slow burning reactions.
As CO2 is always a result of a burning reaction, it is non-combustible and inert. At temperatures below -79 °C (-110 °F) CO2 becomes solid, and then it’s known as dry ice, which is typically used in transportation or cargo of frozen goods. All of the above characteristics have an impact on the benefits of measuring CO2.
The SMART CO2 connects wirelessly to the global Sigfox™ radio network to send instant mobile, SMS, or email alarm notifications as well as keeping a permanent record of conditions, including automated daily and weekly reports.
CO2 in Indoor Air
To keep the CO2 concentration at the recommended level of below 1000 ppm inside places like office buildings, hospitals, and schools, it’s important to control it, which can be done with a building automation system. In colder climates controlling CO2 levels saves energy and helps to maintain optimal air quality, which has a direct impact on the wellbeing and efficiency of employees occupying the space.
CO2 in Greenhouses
In some applications it’s desirable to keep the CO2 concentration at a higher level than the ambient concentration of about 400 ppmCO2. In greenhouses, for example, CO2 is used as a fertilizer for the plants. To optimize yield, it’s important to maintain optimal levels of CO2: it’s expensive to use as a fertilizer and excessive use increases costs, but not the harvest.
CO2 in Incubators
CO2 incubators, or the growth or storage chambers for biological samples, are critical applications, where the CO2 levels are kept elevated, often at 5 %CO2., which together with elevated temperature and high humidity ensure optimal growth conditions for the specimens. These both are typical measurement and control applications for CO2 as it’s not possible to cultivate cells if the CO2 levels are inaccurate.
CO2 IN REFRIGERATION
Carbon dioxide CO2 is a non-flammable, natural, low cost refrigerant with negligible direct global-warming impact and ozone-depletion potential compared to traditional hydrofluorocarbons (HFC). CO2 refrigerant is becoming more widely used in the refrigeration industry. As high CO2 levels are a potential health risk, CO2 level must be monitored in places where potential refrigerant leaks can occur.