O2 Gas Sensor

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

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.



  • Measurement Range: 0–27% (0-270 ppt)
  • Accuracy (@ Standard Pressure 760 mm Hg): +/- 1% volume O2
  • Resolution: 0.01%
    (LabQuest 2, LabQuest, LabQuest Mini, Go!Link, LabPro)
  • 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
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

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What’s Included

  • Vernier O2 Gas Sensor
  • 250 mL gas sampling bottle
  • User manual

Sensor Requirements

The O2 Gas Sensor requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The O2 Gas Sensor is compatible with these interfaces:

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
O2 Gas SensorO2-BTA$188
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 O2-BTA
U.S. Educator Price $188

Sample Data

Measuring gases during photosynthesis
Measuring gases during photosynthesis
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