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Miniature Solution for Real-time Continuous CO Monitoring

Cairsens® CO

The Cairsens© sensor allows specific pollutant measurement comparable to reference methods. The high quality sensors are renowned worldwide by our customers looking for the newest technologies in air quality monitoring.

Excellent measurement accuracy is achieved by limiting the effect of humidity interference by using a specific and patented inlet filter combined with dynamic sampling. CO micro-sensor

Have questions? Call +61 2 9622 6327

  • CO real-time monitoring
  • Very high sensitivity to capture low-level gas concentrations (down to ppb)
  • Accurate measurement data at a fraction of the cost of Reference Analyzers
  • No maintenance is required during the Cairsens®’s lifetime
  • No need for re-calibration during 12 months
  • Embedded USB and UART / ModBus communication ports
  • Up to 20 days of 1-minute data storage capacity
  • Ultra-small, with close to zero power consumption
  • Ready to use and easy to integrate
  • Measurements meet European directive 2008/50/EC for indicators

Cairsens® are manufactured in France and calibrated in our metrological laboratory using Standard Reference AQMS monitors. Every sensor shipped includes a calibration certificate.

  • Indoor and outdoor air quality monitoring: smart cities, road-side & tunnels, schools, airports, ship terminals…
  • Odor monitoring: WWTP, recycling, pulp and paper manufacturing, sewage treatment facilities, refineries
  • Leak detection and monitoring of fugitive emissions: quarries, storage facilities, mines, manufacturing plants
  • Providing data for air dispersion modeling
  • Health and safety: mines, industrial sites, construction
  • Forecasting of industrial fence line emission
Measured parameterCO
Article codeA40-0404
Measuring Range (ppm)0 –20
Certified* Detection Limit (ppm)0.05
Resolution (ppm)0.001
Operating Temperature (°C)-20 to 50
Operating Relative Humidity (% HR)10 to 90 (non-condensing)
Sensor TypeElectrochemical

Metrological performances according to the European Directive 2008/50/EC are guaranteed for 12 months

Storage Conditions

Temperature (°C)+5 to +20
Relative Humidity (% HR)> 15 (non-condensing)
Duration of Storage (Max)3 months

Technical Data

Sampling methodDynamic air sampling, with a controlled micro-fan
Power supply5VDC / 500mA, USB port of a PC or Power bank type «Always on» (not provided)
Power consumption20 mA max under 5 VDC
I/O communicationsUSB, UART, Modbus RTU-TTL. Modbus RS445 on request (article code A40-0219)
Lifetime duration24 months
LCD DisplayConcentration in ppb or ppm, operating status, memory available
Control & data treatmentInternal microprocessor for data acquisition and treatment, embedded timer
Data Storage (internal)20 days for 1 min data, 303 days for 15 min data, or 1212 days for 60 min data
Download data mode– Cairsoft (free download)
– e-SAM DAHS system or Customized integration
– Cairnet® Mini-stations with data exported in the Caircloud®
Weight55 g

Cairsens® are manufactured in France and calibrated in our metrological laboratory using Standard Reference AQMS monitors. Every sensor shipped includes a calibration certificate.

Electrical safetyNF EN 61010-1: 2010
Electromagnetic CompatibilityNF EN 61326-1: 2013
Protection IndexIP 42 (according to IEC 60529)
European directive2008/50/EC


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