Vernier Software and Technology
Vernier Software & Technology

O2 Gas Sensor

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The O2 Gas Sensor can be used to monitor gaseous oxygen levels in a variety of biology and chemistry experiments. The sensor is intended for measuring gaseous, not aqueous, O2 concentration.


The O2 Gas Sensor measures oxygen concentration in air, and is temperature compensated for use in different environments. It has a wide measurement range, allowing it to be used to study human and cellular respiration. The O2 Gas Sensor also includes a 250 mL bottle that can be used to study the rusting of iron or as a respiration chamber for monitoring plants and insects.

Sample Data



  • Measurement Range: 0–27% (0-270 ppt)
  • Accuracy (@ Standard Pressure 760 mm Hg): +/- 1% volume O2
  • Typical Resolution: 0.01%
  • Response Time: ~12 seconds to 90% of final value
  • Warm-Up Time: Less than 5 seconds to 90% of final value
  • Pressure Effect:

    • Directly proportional
    • Vout = Vout (standard) x (P/1013)
    • Pressure range: 0.5 atm to 1.5 atm
  • Output Signal Range: 0 to 4.8 VDC; 2.7 to 3.8 VDC @ 21% O2
  • Output Impedance: 1 KΩ
  • Input Voltage: 5 VDC +/–0.25 VDC
  • Gas Sampling Mode: Diffusion
  • Normal Operating Temperature Range: 25°C (±5°C)
  • Operating Temperature Range: 5 to 40°C (with calibration)
  • Operating Humidity Range: 0 to 95% RH
  • Storage Temperature Range: –20 to +60°C
  • Dimensions:

    • Sensor Tube: 45 mm length, 28 mm OD; total length: 120 mm
View the O2 Gas Sensor user manual

Experiments and Lab Ideas

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

Lab Ideas and Innovative Uses

Do you have an innovative use for Vernier technology? What about a favorite lab or demo? We love to hear what creative uses people have for our products. Please email them to

Compatibility Requirements

The O2 Gas Sensor may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
O2 Gas SensorO2-BTA$199
Optional Accessories
250 mL Nalgene Bottle w/LidCO2-BTL$5
BioChamber 2000BC-2000$22
BioChamber 250BC-250$8
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 »

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