Go Direct® CO2 Gas Sensor

The Go Direct CO2 Gas Sensor measures gaseous carbon dioxide concentration levels, air temperature, and relative humidity. It can be used in a variety of biology experiments. It connects via Bluetooth® wireless technology or via USB to your device.

SKU: GDX-CO2 Categories: ,


Monitor changes in carbon dioxide, temperature, and relative humidity easily with the Go Direct CO2 Gas Sensor. This sensor includes built-in temperature compensation and humidity protection. A 250 mL Nalgene bottle is included for running controlled experiments with small plants and animals.

The Go Direct CO2 Gas Sensor is ideal for the following experiments:

  • Measure the change in gas concentration during cellular respiration.
  • Measure the change in gas concentration during photosynthesis.
  • Study the effect of temperature on cell respiration or metabolism of organisms.
  • Investigate artificial selection in yeast by comparing respiration rates of different strains.

Rechargeable Battery—Ready When You Are

The robust rechargeable battery offers long battery life and provides always-ready operation when using the sensor wirelessly. Monitor battery life directly from our free Graphical Analysis 4 app or LabQuest 3 App. Should the battery run low, simply connect the sensor to the charging cable and keep on collecting—no interruptions or inconvenience to you or your students.

Wired or Wireless—The Flexibility to Choose

Our Go Direct sensors connect directly to your mobile device, Chromebook, or computer using our free Graphical Analysis 4 app—no additional equipment or software purchases are necessary. Go Direct sensors can be used wired via USB or wirelessly via Bluetooth® wireless technology, allowing you to choose the solution best for your classroom or laboratory.

CO2 SensorType: NDIR
Range: 0–100,000 ppm
Accuracy0 to 1,000 ppm: ±100 ppm
1,000 to 10,000 ppm: ±5% of reading + 100 ppm
10,000 ppm to 50,000 ppm: ±10% of reading
50,000 to 100,000 ppm: ±15% of reading

Resolution: 1 ppm CO2

Temperature SensorType: integrated circuit (IC)
Accuracy: ±0.5°C
Resolution: 0.1°C

Relative Humidity SensorType: integrated circuit (IC)
Accuracy: ±5% or better
Resolution: 0.1%

DimensionsSensor shaft length: 82 mm
Sensor shaft diameter: 28 mm
Total length: 200 mm

ConnectionsWireless: Bluetooth
Wired: USB

Go Direct® CO2 Gas Sensor
Micro USB Cable
250 mL Nalgene Bottle w/Lid

BioChamber 2000 (BC-2000)
BioChamber 250 (BC-250)
Go Direct® Charge Station (GDX-CRG)

250 mL Nalgene Bottle w/Lid (CO2-BTL)
Micro USB Cable (CB-USB-MICRO)
Go Direct® 650 mAh Replacement Battery (GDX-BAT-650)

User Manual: https://www.vernier.com/manuals/gdx-co2/
Warranty: 5-year limited warranty (1 year on battery)


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Our products compliment your teaching and help your students engage with key STEM concepts.

Educational Standards

Our products support provincial requirements for NGSS, AP, and more.