TX 20% CO2 Industrial Sensor RS485 4-20mA 24VDC

20% CO2 Industrial Sensor RS485 4-20mA 24VDC
Regular price $199.00 USD

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The 20% CO2 Industrial Sensor on a TX board is designed for measuring high carbon dioxide levels in industrial applications. It uses a GSS ExplorIR®-M 0-20% carbon dioxide sensor mounted on a TX board that adds a robust RS485 Modbus RTU interface, industry-standard 4-20mA analog output, and 6-24VDC power capability.

The TX Sensor Development Kit adds the ability to quickly communicate with the CO2 sensor using our free GasLab software, a 6VDC wall adapter and a custom RS485 to USB cable. The devkit not only allows you to quickly get up and running with the sensor, but provides graphing, data logging, and the ability to zero and span calibrate the sensor.


  • Accurate NDIR LED CO2 sensor
  • Sensor life expectancy: > 15 years
  • RS485 Modbus RTU, 4-20mA analog outputs
  • Built to reliably measure gas levels in harsh environments
  • Easy integration into PLC and industrial applications


  • TX-26 - 20% CO2 Sensor on TX Board
  • TX-261 - 20% CO2 Sensor Development Kit includes TX Board, RS485 to USB cable and 6VDC power supply


  • Measuring Gas: Carbon Dioxide
  • Measurement Range: 0.1-20% CO2
  • Sensing Method: LED NDIR
  • Measurement Interval: 1 Sample/second
  • Response Time: < 60 seconds
  • Warm-Up Time: < 60 Seconds at 72°F (22°C)
  • Power: 6-24VDC
  • Temperature Accuracy: +/- 2 degrees C
  • Operating Temperature: -30°C to +60°C
  • Barometric Pressure Range: 500 to 1200 mbar
  • Sensor life expectancy: > 15 years


    • See GasLab, Inc. - Terms and Conditions. 

    Free Easy-to-use GasLab® Software

    The Devkit uses GasLab® software for setup, calibration, data logging, and real-time data analysis via USB. GasLab® makes it easy to export data into a .CSV file that can be imported into any industry-standard software or spreadsheet. GasLab® runs on Windows XP or higher, and free to use with our products.

    Download Software

    System Requirements

    • Windows XP SP2 or newer
    • Microsoft .Net 3.5 Runtime Libraries

    Tube cap adapters easily convert 20mm standard gas sensors from diffusion to sampling sensors. Molded polymer grips sensor for easy fit and removal while maintaining a good seal.

    Micro-Pump Kit includes all the tools you need to utilize the tube-cap adapters as part of a sampling sensor system.

    Nafion tubing is a highly selective, semi-permeable membrane to water vapor. If gases inside Nafion tubing are wetter than gases surrounding the tubing, drying will occur. If the surrounding gases are wetter, humidification will occur.

    Micro gas sampling pumps provide a constant flow of air across the sensor with a tube cap - perfect for bench-top testing of sensors for closed-loop sampling applications.

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    "Swift response and shipment. The product is easy to setup and use. It is just what I was looking for."

    - Shima Tomohiro

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