CO2 Gas Sensor

Product image for CO<sub>2</sub> Gas Sensor
Product image for CO<sub>2</sub> Gas Sensor
Product image for CO<sub>2</sub> Gas Sensor
Product in use image for CO<sub>2</sub> Gas Sensor
Product in use image for CO<sub>2</sub> Gas Sensor

The CO2 Gas Sensor measures gaseous carbon dioxide in two ranges–0 to 10,000 ppm and 0 to 100,000 ppm.


With this sensor, you can easily monitor changes in CO2 levels occurring in respiration of organisms ranging from peas to humans. A 250 mL respiration chamber with probe attachment is included for running controlled experiments with small plants and animals.

  • On the high range, you can explore human respiratory changes in CO2 levels based on exercise.
  • The lower range offers more sensitivity and a wider interval for cellular respiration and photosynthetic metabolism studies.



  • Response time: 95% of full-scale reading in 120 seconds
  • Warm-up time: 90 seconds
  • Pressure effect: 0.19% of reading/mm of Hg from standard pressure
  • Output signal range: 0-4.0 V
  • Gas sampling mode: diffusion
  • Normal operating temperature range: 25°C (±5°C)
  • Operating humidity range: 5–95% (non-condensing)
  • Storage temperature range: –40 to 65°C
  • Measurement Range:
    • Low range: 0 to 10,000 ppm CO2
    • High range: 0 to 100,000 ppm CO2
  • Typical Accuracy (at standard pressure, 1 atm):
    • Low range:
      • 0 to 1,000 ppm: ±100 ppm
      • 1,000 to 10,000 ppm: ±10% of reading
    • High range:
      • 0 to 1,000 ppm: ±100 ppm
      • 1,000 to 100,000 ppm: ±20% of reading
  • Resolution (LabQuest 2, LabQuest, LabQuest Mini, Go!Link, LabPro):
    • 0 to 10,000 ppm CO2: 3ppm
    • 0 to 100,000 ppm CO2: 30ppm

Download the user manual for full specifications

Experiments and Lab Ideas

Select a lab book to see a list of experiments and more information.

Lab Ideas and Innovative Uses

What's Included

  • Vernier CO2 Gas Sensor
  • 250 mL gas sampling bottle (Nalgene bottle with lid)
  • User manual


The CO2 Gas Sensor requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The CO2 Gas Sensor is compatible with these interfaces:

Ordering Information

All prices are for U.S. educators.

    NameOrder CodePriceQuantity
    CO2 Gas SensorCO2-BTA$249
    Optional Accessories
    250 mL Nalgene Bottle w/LidCO2-BTL$3
    BioChamber 2000BC-2000$19
    BioChamber 250BC-250$6
    O2 Gas Sensor to Spirometer AdapterO2-SPR$8

    Related Products

    Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

    Order Code CO2-BTA
    U.S. Educator Price $249

    Sample Data

    Respiration of peas
    Measuring gases during photosynthesis
    Measuring CO2 gas and ethanol production during fermentation
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