Measurement
CO2
Carbon dioxide monitoring for indoor air quality, HVAC systems and controlled test chambers.
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CO₂ Measurements
Carbon dioxide measurement is required in many applications from building automation and greenhouses to life science and safety. Many technologies are used to measure CO₂. Infrared (IR) sensing is the most widely applied one.
Benefits of IR sensors over chemical sensors:
- stable and highly selective to the measured gas
- a long lifetime and
- they withstand high humidity, dust, dirt, and other harsh conditions.
How to measure CO₂?
CO₂ is a colorless and odorless gas that is soluble in water. It is the bubbles in the fizzy drink, a greenhouse gas, a byproduct of burning reactions, and in the air we exhale. CO₂ is itself non-combustible and inert gas, which makes reliable measurement challenging. The most dependable method for CO₂ measurements is Vaisala CARBOCAP® carbon dioxide sensor, an optical infrared measurement with groundbreaking innovations.
What makes Vaisala’s CO₂ sensors unique?
Vaisala uses a single-beam and dual-wavelength NDIR (Non-dispersive infrared) technology for measuring CO₂. The patented CARBOCAP® technology is used in all its CO₂ sensors. This technology incorporates a unique tunable band pass filter that was developed by Vaisala and is manufactured in our own state-of-the-art cleanroom.
The Vaisala CARBOCAP® - Advanced CO2 measurement technology
Measurement Excellence
The CARBOCAP® sensor allows for measurement of both the CO₂ absorption signal and a reference signal using a single set of components. Because of this, Vaisala is getting a real reference measurement in every measurement cycle. This eliminates the most common drift factors normally associated with all other NDIR sensors. The results of this breakthrough are excellent long-term stability, a long service life and the ability to function in the most demanding environments, including warm, humid, and dusty environments.
Installation of Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMW90
Typical applications for CO²
Vaisala CARBOCAP® instruments are well suited to a wide range of applications, from ppm (parts per million) to percentage-level CO₂ measurements. Since CO₂ replaces oxygen, it can be harmful to people in very high concentrations. CO₂ is present at percentage levels only within closed processes such as fermentation and controlled-atmosphere storage environments. Percentage-level measurements are also typical in life-science applications such as CO₂ incubation.
Application areas
- Life science incubators
- Cold storage facilities
- Food & beverage, fruit and vegetable transportation
- Fermentation & brewing
- Agriculture: greenhouses, mushroom farms, animal husbandry (hatchers, egg setters)
- Ecological measurements, for example, soil respiration and ambient CO₂ measurement
- HVAC
- Packaging
Benefits of Vaisala’s CARBOCAP® sensors
Stability & long lifetime
The unique design of CARBOCAP® results in recommended calibration intervals of up to 5 years. Its microglow light source is rated for 15+ years of stable light output providing many years of trouble free use.
24/7 Occupation
Suitable for use in spaces occupied 24/7 as well as dusty and dirty industrial environments. CARBOCAP® does not rely on the assumption of CO₂ concentrations dropping to background levels in order to make any drift compensations.
Out of the box performance
Shows correct values immediately after power-up because the CARBOCAP® does not need to “learn” its environment like other technologies do.
Instruments (7)
Indigo200 Series Transmitters · INDIGO201
Vaisala Indigo200 series transmitters are host devices for displaying measurement values from interchangeable Vaisala smart probes. Indigo200…
Indigo200 Series Transmitters · INDIGO202
Vaisala Indigo200 series transmitters are host devices for displaying measurement values from interchangeable Vaisala smart probes. Indigo200…
Multigas CO2 instrument MGP241 for CCUS
The new MGP241 is the smartest solution for process CO2 measurement. From carbon capture to general industrial use, it's built to endure and excel in…
CO2, Humidity and Temperature Transmitter Series XMW85
Smart and reliable indoor air monitoring with Modbus RTU
Applications
Cleanrooms
Reduce the risk of out-of-specification conditions and help keep your cleanrooms audit-ready and compliant.
7 instruments
Notes and publications
How to Measure Carbon Dioxide (CO₂)
How infrared sensors work, temperature/pressure/humidity compensation, and transmitter placement.
Measuring CO2 in Life Science Incubators
Why CO2 is critical in cell culture, the risk of condensation when measuring in high humidity and temperature, and why sterilization without removing…
CO2 in Controlled-Atmosphere Storage
Why O2 is lowered and CO2 raised in controlled-atmosphere rooms, and which instruments withstand the cold and high humidity of this environment.
CO2 in Ecological Soil, Snow and Water Measurements
What equilibrium sampling is, why sensor heating can skew field measurements, and what range is needed for deep soil profiles.
CO2 in HVAC Systems and Indoor Air Quality
Why demand-controlled ventilation saves energy, and why sensor quality determines whether that ventilation works reliably.
CO2 in Fermentation and Brewing
Why CO2 is a real safety risk in breweries and wineries, which areas concentrate the highest risk, and which instruments cover each concentration…
A question about your measurement
A specialist replies with the solution, the instrument and the service that fit.