3-in-1 room sensor

  • Monitors indoor air quality

    Monitors indoor air quality

    The CO2 sensor analyzes the atmosphere every 5 minutes and informs you whether you need to air or close the window

  • Connected


    Personalized notifications and advice on your smartphone app if Indoor Air Quality deteriorates

  • Temperature / Humidity

    Temperature / Humidity

    For optimum indoor comfort, OPEN’R continuously measures your home’s environmental parameters

  • CO2

  • Humidity

  • Zigbee

Monitor CO2 at a glance!

Breathing clean air is crucial to your health. The OPEN’R sensor detects high levels of CO2 and guides you on what action to take. Good indoor air quality reduces the risk of allergies and asthma, and contributes to your well-being.

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Measurement accuracy

CO2 sensor analyzes the air every 5 minutes and automatically recalibrates every week

Indicator light visible from over 5 metres

The Green / Orange / Red indicator changes with the CO2 level. The "ppm" trigger threshold can be reconfigured at your convenience

Control Indoor Air Quality

In addition to the health benefits, a home with good air quality is simply more pleasant to live in. Unpleasant odors and stagnant air can be avoided. With OPEN’R you can adjust your indoor environment to make it more comfortable for you and your family.

Air 360°

Numerous side openings for better ambient air analysis

Signal tone

An audible signal notifies occupants if Indoor Air Quality deteriorates. Signal can be activated/deactivated locally or remotely
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Save energy!

By monitoring air quality and temperature, you can adjust the operation of your ventilation, heating or air conditioning systems more efficiently. You won’t have to run these systems unnecessarily if the air is already clean, which can lead to energy savings and, consequently, lower bills.

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Long-term measurement reliability

Guaranteed consistency and accuracy, with no measurement drift over time


Accuracy: +/- 2% RH


Accuracy: +/- 0.2°C

Fast and secure installation

Easy to install

Freestanding on a table or wall-mounted. Adhesive mount included

Anti-theft protection

Lockable mounting base reduces risk of sensor removal

Superior performance for optimum data transmission

Calculate your product’s projected autonomy with our online application VOLT

Calculate range with VOLT
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Optimized PCB radio antenna

Designed to ensure reliable radio connectivity, even in harsh environments, while limiting power consumption to extend battery life

Enhanced cyber security

Data transmitted by the product is secured from end to end using double AES128 encryption.


  • Carbon Dioxide

    Carbon Dioxide

    Res. 1 ppm
    Prec. ±(50 ppm + 3% of value)
    Measurement range: 0 to 5.000 ppm

  • Temperature


    Res. : 0.1°C
    Prec. : ±0.2°C
    Measurement range: 0°C to +50°C

  • Humidity


    Res. 0.1% R.H.
    Prec. : ±2% R.H.
    Measurement range: 0 – 100% R.H.


  • Connectivity

  • Conditions of use

    Indoor environment
    Temperature: -10°C to +50°C
    Humidity: 0% RH to 100% RH

  • Mounting type

    Wall-mounted or free-standing

  • Set contents

    1 sensor
    1 CR123 battery
    1 mounting base
    1 removable stand
    2 nylon screws and plugs
    1 user manual

  • Certification

  • Warranty

    2 years**


Reference Battery Radio
N420ZB 3 years Zigbee

No more messy cables!

OPEN’R is entirely battery-powered.

  • No electrical connections or extension cords to pull
  • Very low power consumption for sensors and on-board electronics
  • Includes 1 replaceable CR123A battery with 3-year operating life
Smoke detector. 10-year battery / Détecteur de fumée
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Instantly assess air quality

Would you like to know the CO2 level in your room and whether it’s time to air it out? By pressing the front button, you’ll get a direct overview of air quality on your mobile app.

Who says an air quality sensor can't be elegant?

OPEN’R combines technology with a modern, minimalist design that blends harmoniously into any interior environment.

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*The battery is designed for a non-guaranteed life of 3 years: battery life may vary. Please refer to the “Precautions and Limitations” section of the user manual.

**Refer to the “Warranty” section of the user manual.