CO₂ Room Sensor with Traffic Light Display

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  • CO₂

CO₂ Guard 10

The CO₂ Guard 10 reliably shows the carbon dioxide (CO₂) concentration in the ambient air as a measure for indoor air quality (IAQ). The CO₂ level indicated by the LEDs helps deciding on the need for ventilation, for example by opening the windows.

  • CO₂ Guard 10 - Tabeltop

  • CO₂ Guard 10 - Wall mount

    Adequate ventilation and IAQ is paramount for healthy living and working conditions. In spaces with high occupancy, good IAQ diminishes the risk of contamination with aerosol-borne diseases. Additionally, air exchange based on the actual CO₂ level can significantly reduce energy costs.

    Measurement performance
    The CO₂ Guard 10 employs the dual wavelength NDIR measurement principle with auto-calibration, which stands for outstanding long term performance even in harsh and polluted environment. Pressure and temperature compensation with on-board sensors lead to best accuracy irrespective of the location (altitude), weather and environmental conditions.

    The CO₂ Guard 10 can be deployed as wall mount or as portable tabletop device. The tabletop stand adapter is included in the scope of supply.

    Comfortable use
    The CO₂ Guard 10 is maintenance free. Battery supply allows for portable use independently of any external electrical supply availability. All LEDs flashing indicate the need for replacing the batteries.

    Visual and acoustic indication
    Green, yellow and red LEDs indicate the actual CO₂ range. Additionally, short acoustic signals indicate CO₂ rising to the next higher range.

    Wide CO₂ monitoring range
    The six CO₂ ranges indicated by the LEDs are suitable for all common indoor situations from low to high CO₂ levels. Low CO₂ levels are typical for residential and commercial purposes according to EN 13779. High CO₂ levels typically occur in spaces with very high occupancy such as school classes.

    Long battery life time
    A set of 4 commercially available batteries lasts for typically 6 months at room temperature. The snap-on enclosure concept allows for easy battery replacement without any specific tools.

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    Key Features

    • Dual wavelength NDIR technology with auto-calibration
    • Pressure and temperature compensation
    • Optic and acoustic indication
    • Low energy requirements
    • Suitable as wall mount and as tabletop device

    Technical data

    Working range
    0...5000 ppm
    4 alkaline batteries AAA 1.5 V
    4 rechargeable batteries AAA 1.2 V
    Battery life time
    6 months (4 alkaline batteries 1.5V - 1200 mAh)
    4 months (rechargeable batteries 1.2 V - 1100 mAh)
    Polycarbonate (PC)
    Protection rating
    IP30 (wall mount) IP20 (tabletop)

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    Downloads CO₂ Guard 10


    Insert the batteries observing the right polarity. This may require some pressure. To make safe contact with the terminals of the battery holder, the batteries may need to be slightly moved or rotated.


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