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004-0-0017 S8 Alarm 5% CO2 Sensor

004-0-0017 S8 Alarm 5% CO2 Sensor
Regular price $48.00 Sale price

Compare at $99.00

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The S8 5% Alarm CO2 Sensor (004-0-0017) is designed to act like a safety switch for alarm applications where CO2 leak detection around tanks or cylinders of compressed CO2 gas is required. It comes with Automatic Background Calibration (ABC) turned on.

Thanks to a new optical path design, the S8 can accurately measure carbon dioxide levels up to 5%, yet it has less than a 30x20x10mm footprint and runs on only 30mA.

This sensor is designed for commercial applications. It provides simple communication via UART which lets you change the measurement period and control the ABC period in real time. Background and zero-gas calibrations are also implemented in a simple manner.


  • Low Power, Small Footprint Design
  • Automatic Background Calibration
  • Industry-Standard UART Communication


  • S8 Alarm 0-5% CO2 Sensor (004-0-0017) - pinless design for integration into high-volume OEM products. ABC on.
  • Sensor Development Kit (CM-200) - Easy to use, simply plug the sensor into the PCB and plug it into your PC via USB. Use our free GasLab® software to measure and graph carbon dioxide or use our library of source code on Github to build your own application or for OEM batch testing/configuration. Order the sensor on this page, then order the Devkit here.

We recommend that all first time users purchase both this sensor and the CM-200 Development Kit for fastest and easiest results.


  • CO2 Measurement: non-dispersive infrared (NDIR)
  • Measurement Method: Diffusion
  • Measurement Range: 0-5% (0-50,000ppm)
  • Response time: 90% at 2 minutes
  • Rate of Measurement 0.5 Hz (every 2 seconds)
  • Accuracy: ± 200ppm ± 10% of measured value
  • Available Output: analog
  • Communication Options: UART Modbus
  • Sensor Life Expectancy: > 15 years
  • Maintenance Interval: no maintenance required
  • Self-Diagnostics: complete function check on startup

Electrical / Mechanical

  • Dimensions: 32.7 × 19.7 × 8 mm (LxWxH)  < 8 grams.
  • Power Input: 4.5-5.25 VDC
  • Max Current: 300 mA
  • Power Consumption: 300mA peak, 30mA average



Gas Sensor Development Kit (CM-200)- designed to provide customers with an easy drop-in solution. Includes our free Gaslab data logging software. Sensor sold separately.

  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

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"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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