Wireless CO2 Sensor - PS-3208



Use this wireless sensor to measure the concentration of Carbon Dioxide gas in a closed system or open environment. Study core topics (including photosynthesis, respiration, and carbon cycling) with this versatile probe.

CO2 data can be logged directly on the device for long term life science and environmental science studies.

New Accessory:  The Dissolved Water Proof CO2 Sleeve (PS-3545)  shields the sensor from water, but is permeable to CO2 allowing for measurements of dissolved carbon dioxide levels. This PASCO exclusive opens up new applications for this carbon dioxide sensor.

Typical Applications

  • Measure CO2 uptake during photosynthesis in a terrarium
  • Compare indoor vs. outdoor CO2 levels
  • Study cellular respiration of yeast
  • Conduct chemical reaction studies

Special Features

  • Simplicity: just pair and go
  • Variable sampling rate for capturing small fast changes or experiments that run for hours, days, or weeks.
  • Features convenient Bluetooth wireless connectivity and long-lasting rechargeable battery
  • Logs carbon dioxide gas data directly onto the sensor for long-term experiments.

Bluetooth Low Energy Wireless Connectivity

Required Software:

PASCO products that use Bluetooth® Low Energy connectivity (wireless sensors, Smart Carts, and the AirLink) require the latest versions of our software.

PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

Additionally, the Wireless Motion Sensor and Wireless Smart Carts can be connected via Bluetooth and used with our MatchGraph app.

Compatibility/System Requirements

Any current model Chromebook, Mac, iPad, iPhone, Android tablet or phone will support direct connection to PASCO Bluetooth Low Energy devices. Also, any Windows 10 device with Creators Edition 1703 or later will support direct connection.

Chromebook users MUST have the latest firmware updates for ALL wireless sensors in order to use them without the USB Bluetooth Adapter. Full information.

All other Windows computers/tablets, older Macs, and Chromebooks without updated sensor firmware currently require the PS‑3500 USB Bluetooth Adapter to connect to PASCO’s Bluetooth Low Energy devices.

Full compatibility details are available, including compatibility information for older computing devices.


Independent datalogging 

Long term data collection directly on the sensor

In logging mode wireless sensors collect data to their onboard memory for hours, days, weeks or even months at a time without needing to be connected to a computer, tablet, Chromebook or smartphone.

When the experiment is concluded, simply connect the sensor to a device running PASCO software and download all the measurements it recorded.



New Storage Option

Simplify storage & inventory

Custom Gratnells Tray for Wireless CO2 Sensors (PS-3598)

The precision cut inserts are designed to accommodate up to 10 Wireless CO2 Sensors

See the buying guide below for details


  • Sensor
  • 250-mL sampling bottle
  • USB charging cable
  • Specifications

    • 0 to 100,000 ppm
    • 2 ppm
    • 0 to 1000 ppm: ± 100 ppm
    • 1000to 10,000 ppm: ± 5% of reading+100ppm
    • 10,000 ppm to 50,000 ppm:± 10% of reading
    • 50,000 - 100,000 ppm:± 15% of reading
    • USB
    • Bluetooth® 4
    Battery life
    • 18-24 hours of continuous use either when connected to devices or in logging mode.
    Working Environment
    • 0-50 °C
    • 0-95% Relative Humidity
    Warm-up Time
    • 180 seconds
    Response Time
    • 90% in 30 seconds
    Pressure Effect
    • 0.19% of reading per mmHg from standard pressure
    Gas Sampling Mode
    • Diffusion


    2017 Tech & Learning Awards of Excellence logo

    The Wireless CO2 sensor received an Award of Excellence from Tech & Learning in the "Best New Products" category for 2017.

    Buying Guide

    USB Bluetooth Adapter

    Windows devices, Chromebooks and older Macs lack native Bluetooth® Smart support and require an adapter to use PASCO wireless products.

    All current model Macs, iPads, iPhones, Android tablets or phones support direct connection to PASCO Bluetooth Smart devices and do not require the adapter.

    Full compatibility details are available.

    USB Bluetooth Adapter   PS-3500
    Dissolved CO2 Waterproof Sleeve

    This sleeve allows the Wireless CO2 Sensor to take aqueous measurements of dissolved carbon dioxide gas.

    Dissolved CO2 Waterproof Sleeve   PS-3545
    250 mL Sample Bottles (4-pack)
    Replacement Parts

    A four pack of replacement 250 mL sample bottles.

    250 mL Sample Bottles (4-pack)   SE-6938

    Software Required

    SPARKvue software or PASCO Capstone software may be used. PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

    Learn more about Bluetooth Compatibility.