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CO₂ Check™ devices use the most precise nondispersive infrared technology (NDIR) Senseair-brand sensors for accurate CO₂ measurements.

  • Measures: CO₂ (Carbon Dioxide)
  • Operating environment: indoor use -- 32 to 100 degrees Fahrenheit (0 to 38 degrees Celsius)
  • Transmitter power: 14 dBm
  • Data Transmission: 2 seconds
  • Battery Life: Up to 12 hours when fully charged
  • Protection class: IP20
  • Dimensions: 70x54x25 mm
  • Weight: 1.9 ounces


Senseair S8 Residential CO₂ Sensor

  • Measurement range: Up to 10,000 ppm
  • Power Supply: 4.5 V to 5.25 V DC
  • PWM output: 0 to 100 % duty cycle for 0 to 2,000 ppm
  • Communication: UART (Modbus)
  • Operating temperature: 32 to 100 degrees Fahrenheit (0 to 38 degrees Celsius)
  • Accuracy: ± 70 ppm ± 3% of reading at 5 to 30°C, 20-70%RH


CO₂ Check™ monitoring devices are innovative, rechargeable, handheld, battery-powered, stand-alone devices for monitoring CO₂ levels.


Designed for use at home, in schools, offices, restaurants, churches, fitness centers or other indoor environments, CO₂ Check™ devices use cutting edge Senseair™ CO₂ sensors.  The portable, simple to use and easy to operate devices let users know when CO₂ levels become unhealthy so users can take steps to mitigate levels and help keep people safe.

CO₂ Check™ monitor Bluetooth

  • Download more info here.

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