CO2 Sensor Range Compared

co2 sensor senseair

What Range of CO2 Sensor is best for your application?

Carbon dioxide sensors are offered in in many different ranges, from 1,000ppm to 100% CO2. Selecting the sensor with the correct range of CO2 to be measured for your application is important because, in general, the narrower the range of CO2 levels that can be measured, the more accurate the sensor will be.

In general, CO2 sensors can be divided into 4 groups:

  • < 1% (10,000ppm) sensors to measure indoor air quality
  • 5% sensors for personal safety
  • 20-30% sensors for industrial and biological processes
  • 100% sensors for specialized requirements

Selecting the proper CO2 range for your application makes it easier to choose from our wide range of available CO2 sensors.

Indoor Air Quality

For indoor air quality (IAQ) applications, a 2,000ppm or 10,000ppm CO2 sensor is a common choice. Fresh air contains approximately 400ppm CO2, while the ASHRAE Standard for ambient indoor air in occupied spaces is recommended to be less than 1,000ppm. Therefore, an indoor air quality monitor or transmitter with a sensor that measures low levels of CO2 will work best for IAQ applications.

The most popular sensors we sell in this range are the K-30 by SenseAir and the COZIR Ambient CO2 sensor.

A 10,000ppm CO2 sensor is also a good choice for industrial air quality applications, car parks, garages and more that must meet OSHA specifications. OSHA requires that the time-weighted average (TWA) over an 8-hour workday should not exceed 5,000ppm.

Personal Safety

For CO2 safety applications where workers or the public are around stored carbon dioxide, a 0-5% CO2 sensor is a good choice. These sensors can be used to set off an alarm in the case of a carbon dioxide leak that can be potentially harmful at CO2 levels. For example, the COZIR GC-0015 0-5% CO2 sensor would be a good choice for this type of application.

Industrial and Biological Processes

For industrial and biological processes like wood gasification, capnography or biological incubators, a 20-30% CO2 sensor is a good solution. For example, our SenseAir K-33 ICB, COZIR GC-0006 or SprintIR GC-0017 sensors are all in this range. Their combination of value, speed and accuracy - and the ability to measure up to higher CO2 levels - makes them a good fit for biological incubators. In addition, the high-speed SprintIR GC-0017 20% CO2 sensor is an excellent choice for capnography.

Specialty Applications

For applications like controlled atmosphere storage for grains that require the ability to measure up to 100% CO2, we offer the COZIR GC-0016 and SprintIR GC-0018 CO2 sensors.

 With all the different sensors we offer, it might seem confusing as to which one is best for your particular application. If you still have questions, call us at (386) 872-7665 or email us and our experts on staff will be happy help you make the right selection.

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