Carbon Dioxide

CO2 and humidity sensors in incubator

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.

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Vaisala CARBOCAP Technology

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. 

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Installation of a Vaisala HVAC Sensor

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.

CO2 measurement in a greenhouse

Typical Applications

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.

CO2 measurement in chicken farms

Application Areas

  • life science incubators 
  • cold storages 
  • food & beverage, fruit and vegetable transportation 
  • brewing & fermentation 
  • packaging 
  • agriculture: greenhouses, mushroom farms, animal husbandry (hatchers, egg setters) 
  • ecological measurements (soil respiration, ambient CO2 measurement)  
  • HVAC 

Benefits of Vaisala’s CARBOCAP® sensors

Stability

The unique design of CARBOCAP® results in recommended calibration intervals of up to 5 years.

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.

Long lifetime

Its microglow light source is rated for 15+ years of stable light output providing many years of trouble free use.

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.

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