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ExplorIR®-M 5% CO2 Sensor

ExplorIR®-M 5% CO2 Sensor - CO2Meter
Regular price $179.00

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The ExplorIR®-M-5 (formerly known as MinIR-GC-0024) is a miniature CO2 sensor, capable of measuring up to 5% concentration. Its compact and robust design enables easy integration into gas monitoring and detection systems.

ExplorIR®-M is specifically designed for applications that require the sensor to operate reliably in extreme environmental conditions, especially where the pressure, temperature or vibration regime is particularly harsh. This makes it the ideal for applications from aerospace to food storage during transportation.

The sensor is designed to take 2 readings per second, making it ideal for applications where gas concentrations are rapidly changing.

The ExplorIR®-M uses patented solid-state optical technology, which enables the sensor to provide high accuracy CO2 measurement capability over an extended lifetime.


  • Measures up to 5% CO2
  • Low power CO2 sensor
  • Solid-state LED optical technology
  • Vibration and shock resistant
  • UART interface
  • Built-in auto-zero function


  • EXPLORIR-M-5: ExplorIR®-M-5 Sensor – (EXPLORIR-M-5) for integration into high-volume OEM products.
  • CM-40330: ExplorIR®-M 5% CO2 Sensor w/ MX Board - Easy to Use, Includes the 5% CO2 Sensor and MXBoard for Relative Humidity and Pressure.
  • CM-40331: ExplorIR®-M 5% CO2 Sensor Development Kit - Easy to use, simply plug the sensor module into your PC via USB. Use our free GasLab® software to measure and graph carbon dioxide in real time or for data logging. Use a tube cap adapter to create a sampling sensor.
  • CM-200: Sensor Development Kit - 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 sensors on this page, then order the Devkit here.

We recommend that all first-time users purchase either the CM-40331 or CM-200 Development Kit for fastest and easiest results.


  • CO2 Sensing Method: Non-dispersive infrared (NDIR) absorption
  • Sample Method: Solid-state LED NDIR Diffusion
  • Measurement Range: 0-5%
  • Accuracy: ±70 ppm +/- 5% of reading @ STP
  • Time to 1st Reading: <1.2 seconds
  • Resolution: 10ppm
  • Non Linearity: < 1% of FS
  • Operating Pressure Range: 950 mbar to 10 bar
    • external pressure calibration
  • Pressure Dependence: 0.1% of reading per mbar @STP
  • Warm-up Time: < 10s. 1.2 secs to first reading
  • Response Time: <30 Seconds (Diffusion Limited)
  • Readings per Second: 2
  • Operating Temperature: 0°C to 50°C
  • Operating Humidity: 0 to 95% RH, non-condensing
  • Storage Temperature: -40°C to +70°C
  • Dimensions: 20.9 mm x 21.7 mm
  • Weight: 4g sensor
  • Sensor Life Expectancy: >15 years

Electrical / Mechanical

  • Power Input: 3.25V to 5.5V
  • Peak Current: 33mA @ 2 readings/sec.
  • Average Current: <1.5mA
  • Power Consumption: 3.5mW @ 3.3V
  • Measurement Output/Interface: UART (Serial)



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.

Tube cap adapters easily convert 20mm standard gas sensors from diffusion to sampling sensors. Molded polymer. Tube cap adapters are not pre-installed. For accurate results you must mount the tube cap permanently.

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.

Probe Enclosure for Development Kits gives a strong and secure container to mount the sensor. Hydrophobic filters available for enclosure for outdoor use.

  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

Based on 2 reviews
Erik VdBroeck
perfect product, as usual

Speed, precision, economic, all reunited in this small sensor.

George Delaportas

MinIR 5% CO2 Smart LED Sensor

"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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