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CO2 – General information, CO2–Sensors & relevant applications

Carbon dioxide (CO2) is a non-flammable, acidic and colorless gas. Discover all the info about this gas and about the CO2 sensors from Wi.Tec-Sensorik ...

Table of Contents

General information on CO2 / Carbon dioxide

Carbon dioxide (CO2) is a non-flammable, acidic and colorless gas. Because it dissolves well in water, it is sometimes colloquially and incorrectly called »carbonic acid«. CO2 is an elementary component of the global carbon cycle, a natural component of the air and a relevant greenhouse gas in the Earth’s atmosphere. Due to the combustion of fossil fuels, the amount of carbon dioxide in the earth’s atmosphere increased from about 280 ppm (at the beginning of industrialization) to over 410 ppm in 2020.

CO2 measurement in exhaust gas

The measurement of carbon dioxide in exhaust gas is an important indicator of the efficiency and environmental impact of combustion processes. CO2 is an important component of the exhaust gases released during fossil fuel combustion. Precise CO2 measurement using the NDIR method can help optimise combustion processes and minimise their impact on the environment. The results of CO2 measurement can also be used to quantify and evaluate the emission levels of combustion processes, to assess the efficiency of exhaust gas cleaning systems and to make policy decisions on emission controls.

CO2 in the respiratory gas

CO2 analysis in respiratory gas is an important part of medical diagnostics and monitoring. CO2 is a waste product of metabolism and is normally exhaled in the form of carbon dioxide (CO2). A deviation from normal CO2 levels in the breath gas can indicate several health problems, such as respiratory diseases, metabolic disorders, or even diseases of the cardiovascular system. Breathing gas CO2 analysis is often performed in patients suffering from respiratory diseases or under ventilation, as well as in patients who require monitoring of oxygen uptake and delivery. CO2 analysis is a safe, non-invasive procedure that allows for rapid and accurate diagnosis. Usually, this respiratory gas analysis is done with the NDIR method (INFRA.sens).

CO2 in laboratory analysis

CO2 measurement in laboratory analysis is an important process to determine the carbon dioxide (CO2) content in samples such as air, water and solids.  Furthermore, the carbon content (C) can also be determined by a chemical reaction and subsequent CO2 measurement (e.g. TOC analysis and elemental analysis). These measurements are used in various applications, including environmental monitoring, quality control in the food industry and medical diagnostics. In laboratory analysis, CO2 is mostly measured with the NDIR method (INFRA.sens). CO2 measurement in laboratory analysis is an important contribution to monitoring and controlling emissions, monitoring environmental quality and optimizing industrial processes.

What else might be interesting for you when measuring CO2 …

The measurement of carbon dioxide (CO2) is of critical importance for numerous applications worldwide. Traditional methods for measuring CO2 range from infrared-based spectroscopy to chemical sensors. While these technologies are widely used, they can be limited in terms of accuracy and adaptability to specific requirements. Therefore, the challenges of CO2 measurement require innovative solutions.

Wi.Tec-Sensorik excels in CO2 measurement with pioneering technology and superior features. Our NDIR (non-dispersive infrared) CO2 sensors offer industry-leading precision and stability. Our sensors are capable of detecting even the lowest CO2 concentrations with the highest accuracy. They are also extremely fast and responsive, which is critical in applications where rapid measurements are required. Our sensors are also highly customizable, allowing them to be used in a variety of environments and applications. At Wi.Tec-Sensorik, performance stands first and foremost, and we are committed to providing our customers with best-in-class CO2 measurement solutions.

Gas sensors from Wi.Tec-Sensorik for the precise measurement of CO2

Overview Products and Measurement Ranges

  Measuring range (*)
  100
Vol.%
50
Vol.%
30
Vol.%
20
Vol.%
10
Vol.%
5
Vol.%
1
Vol.%
5,000
ppm
2,000
ppm
1,000
ppm
500
ppm
300
ppm
100
ppm
50
ppm
10
ppm
1
ppm
Kombi.sens
INFRA.sens AK5
INFRA.sens AK20
INFRA.sens AK50
INFRA.sens AK100
INFRA.sens AK250
INFRA.sens AK250TBH
(*) Full scale value (F.S.)
For other measuring ranges please refer to our further datasheets

Product Previews

Some relevant Applications to CO2

Gas Insulated Switchgear Monitoring

Gas Insulated Switchgear Monitoring

  • Detection limit (3 sigma) < 0,1 Vol.% 
  • Linearity error < 0,5 % FS (Fullscale) 
  • Including Temperature-compensation 5 - 45 °C 
  • Including pressure compensation 600 - 1200 mbar 
  • Ready to use module 
INFRA.sens® AK2/μP compact // INFRA.sens® AK20G compact  To save the atmosphere – for quality and leakage measurement In gas-insulated high- and medium-voltage switchgear, sulfur hexafluride (SF6) is used as an …
Read MoreGas Insulated Switchgear Monitoring
TOC Analysis

TOC Analysis

  • One channel output for 0-30 Vol.% with accuracy of < 1 ppm (accuracy)
  • 2 sample cell version for different gas path available with only one module
  • Data rate of 100 ms possible
INFRA.sens® AK250G compact  For a better environment – one module all ranges Water occurs in the most varied of qualities in our environment. As a rough differentiation, drinking water, waste …
Read MoreTOC Analysis
Elemental Analysis

Elemental Analysis

  • Area saving solution for 2 gases with best technology selection (NDUV & NDIR)
  • Data rate of 100ms possible
  • Correction algorithm for SO2 to CO2 and vice versa
  • Long lifetime of radiation source
  • SO2 measurement possible with NDIR as well as NDUV
ULTRA.sens® AK100 // INFRA.sens® AK250G compact  High precision leads to higher quality  In chemistry, the term quantitative elemental analysis is used to describe the quantitative determination of the elements carbon …
Read MoreElemental Analysis
Automotive exhaust gas analysis

Automotive exhaust gas analysis

  • For high carbon monoxide ranges additional gas filter for suppression of interfering gases are integrated 
  • Low N2O measurement without CO2 interference powered by software algorithm 
INFRA.sens® N2O / CH4 / CO2-AK220G/AK5 // INFRA.sens® N2O / CH4 / CO2-AK250G/AK5  Low emission means low ranges  Combustion engines emit a large number of gaseous substances that must be …
Read MoreAutomotive exhaust gas analysis
Continous Emission Monitoring (CEM)

Continous Emission Monitoring (CEM)

  • Solution for stationary, mobile and maritime analyzer
  • Vibration tested according to DIN EN60068-2-64(04/2009)
ULTRA.sens® NOx / SO2-AK100 TBH  Environmental Monitoring must not be expensive  In combustion processes, for the generation of electrical energy and heat, a variety of gaseous components are produced, such …
Read MoreContinous Emission Monitoring (CEM)
Renewable Gas Monitoring

Renewable Gas Monitoring

  • Wide range of solution in the area of renewable energy sources and infrastructure
  • Development in progress for a new kind of portable H2S detektor
INFRA.sens® AK20Gcompact & ULTRA.sens® H2S Modul Measure the future energy sources  Biogas is produced by fermentation of organic waste and renewable resources (NAWAROS). The main components of biogas are methane …
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Natural Gas Monitoring

Natural Gas Monitoring 

  • Low power consumption (< 10 Watt) 
  • Small size (28 cm x 20 cm x 10 cm) 
  • Fast response time (t90 = 10 sec.) 
  • No complex calibrations required 
  • Temperature and pressure compensated gas measurements 
  • Designed for high pressure range up to 15 bar 
NGM 1000 Selective measurement in complex gas mixtures  The analysis of natural gas has recently become increasingly important. Since energy flows currently come from a variety of sources, this has …
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Customer Specific Projects

Customer Specific Projects

  • You have a measurement task that goes beyond the usual standards and are looking for a competent partner?
  • Please contact us. Your measurement task is our challenge!
  • The employees of Wi.Tec-Sensorik GmbH have extensive expertise in the field of industrial gas measurement technology and sensor signal processing.
Read MoreCustomer Specific Projects
HXXE20200315134136

Humidity Measurement 

  • Detection limit: < 5 ppm H2O
  • Fast response time (t90 < 10 sec)
  • Efficient alternative for a dew point mirror measurement
  • Low maintenance operation
  • Can be combined with other gas measurements such as CO2, CO, CnHm, CH4 etc.
INFRA.sens® CO2 / HC / H2O – AK250GC / TBH piped  Compact alternative to laser and dew point mirror sensors  Humidity measurement is an important component of gas measurement technology, …
Read MoreHumidity Measurement