10-in-1 ambiant sensor

  • Intelligent and connected

    Intelligent and connected

    On-board data analysis algorithm. Remote reading of measurements. All information is available in a secure cloud space

  • Design


    Facilitates product acceptance by residents

  • Humidity

  • CO2

  • VOCS

  • Noise

  • Brightness

  • Presence

  • Pressure

  • PM

  • HCHO

  • LoRaWAN

Perfect indoor air quality thanks to formaldehyde sensor

ATMO is equipped with a factory-calibrated formaldehyde (HCHO) sensor. Electrochemical measurement technology is optimized to accurately detect low concentrations of HCHO, around WHO (World Health Organization) reference values. With particularly low cross-sensitivity to other VOCs, the sensor offers excellent detection performance for formaldehyde in indoor environments.

Formaldehyde is frequently present in indoor air, originating from certain coatings, floors and furniture. As this gas is highly reactive, it can react quickly and vigorously with other molecules. This makes it a potentially dangerous and carcinogenic compound.

ATMO measures formaldehyde concentrations in real time, to protect buildings and their occupants.

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The product features Air 360° technology for ambient air analysis. Featuring large openings at the rear, this exclusive design allows gases to flow into the heart of the product for fast, reliable analysis.

The algorithm adjusts to available measurement data and quickly assesses air quality. It can analyze up to 9 pollutants simultaneously, measuring the concentration of each and prioritizing their hazardousness. In this way, appropriate measures can be taken to meet the specific conditions of your environment.

Efficient measurement of particulate matter

ATMO is equipped with an optical particulate matter (PM) sensor based on laser scattering. The product is able to measure and discriminate PM1, PM2.5 and PM10 concentrations in great detail. High-quality, durable components ensure accurate measurements from the very first use of the device, and throughout its service life of over ten years.

The finest airborne dusts and particles penetrate deep into the lungs, where they can cause inflammation and impair overall respiratory function.

ATMO will enable you to analyze the actual exposure of a living space to this atmospheric pollution and help you take the most appropriate remedial measures for the situation: ventilation, air filtration, air purifier, etc.

Monitors Indoor Air Quality and controls VOC emissions

ATMO is equipped with a Total Volatile Organic Compounds (TVOC) sensor based on highly sensitive MOx detection technology. This ensures reliable measurement even in damp and dusty environments.

Volatile Organic Compounds (VOCs) are highly volatile and easily dispersed in office or workshop atmospheres. VOCs can be harmful to health, and contribute to olfactory pollution.

ATMO helps you manage the ventilation of enclosed spaces and protect the health of occupants by limiting exposure to pollutants.

See CO2 levels at a glance!

ATMO measures CO2 levels every 10 minutes and visually alerts occupants when it’s time to change the indoor air.

room sensor building / capteur d'ambiance

Instantaneous measurement

Easy to operate thanks to the button on the front of the sensor. Useful for occupants or technicians (function can be disabled)

Regulatory compliance

Direct-reading sensor compliant with French standards for measuring CO2 concentration in indoor air

Indicator light

The Green / Orange / Red indicator changes with the CO2 level and alerts you when it's time to ventilate to renew the indoor air.

Complete environmental control

With its 3 dedicated sensors, ATMO optimizes lighting, energy, acoustic monitoring, space management and security, making it easy to automate your scenarios.

Ambience control

Measures noise and identifies noise pollution. Helps preserve a calm and peaceful environment

Detects presence

The motion sensor detects people up to 6 meters away. Useful for lighting, security or temperature control

Measures ambient light

The brightness sensor measures the amount of light in the room. Ideal for controlling lighting or adjusting temperature more quickly according to sunshine levels
room sensor building / capteur d'ambiance

Reliable, precise temperature and humidity analysis

To limit the risk of erroneous measurements, particular attention has been paid to integrating temperature and humidity sensors.

To guarantee optimum performance, ATMO has undergone rigorous testing and strict validation protocols in extreme operating conditions ranging from -20°C to +50°C and from 0 to 99% ambient humidity.

Calibration certificate

Accuracy of CO2, temperature and humidity measurements validated by a COFRAC-accredited metrology laboratory


Accuracy: +/- 0.2°C


Accuracy: +/- 2% RH

Fast and secure installation

Easy to install

Free-standing on a desk or wall-mounted. Adhesive mount included

Anti-theft protection

Lockable mounting base reduces risk of sensor removal

Compact mounting base

Only 3 cm in diameter to avoid damaging the installation surface
Carbon Dioxide Sensor / Capteur CO2

Superior performance for optimal LoRaWAN® data transmission

room sensor building / capteur d'ambiance

Optimized PCB radio antenna

Designed to ensure reliable radio connectivity, even in harsh environments, while limiting product power consumption

No more data loss!

Historical Data mode or Periodic Send mode, the various transmission modes available ensure maximum reception by the LoRaWAN network gateway.

Enhanced cyber security

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

NAVIXIS: the IoT platform that saves you time

User rights management

Graphical analyses and PDF reports

Real-time alerts or alerts triggered by thresholds

Dashboard and data visualization

Connect and control your LoRaWAN equipment

Smoke detector. 10-year battery / Détecteur de fumée


  • Formaldehyde


    Resolution: 1 ppb
    Accuracy: ±20 ppb or ±20% measured value
    Measurement range: 0 – 10.000 ppb

  • Particulate Matter

    Particulate Matter

    Resolution: 0.1 μg/m3
    Accuracy: ±15 μg/m3 or ±10% of measured value
    Measurement range: 0 – 2.000 μg/m3

  • Carbon Dioxide

    Carbon Dioxide

    Technology: Dual-channel Non-Dispersive Infrared (NDIR)
    Resolution: 1 ppm
    Accuracy: ±(30 ppm + 3% of measured value)
    Measurement range: 0 to 10.000 ppm

  • Volatile Organic Compounds

    Volatile Organic Compounds

    Resolution: 1 μg/m3
    Accuracy: ±25
    Measurement range: 0 to 10.000 μg/m3

  • Temperature


    Resolution: 0.1°C
    Accuracy: ±0.2°C
    Measurement range: -30°C to +70°C

  • Humidity


    Resolution: 0.5% R.H.
    Accuracy: ±2% R.H.
    Measurement range: 0 – 100% R.H.

  • Atmospheric pressure

    Atmospheric pressure

    Resolution: 1 hPa
    Accuracy: ±2.5 hPa
    Measurement range: 300 to 1.100 hPa

  • Brightness


    Resolution: 5 lux
    Accuracy: ± 5 lux
    Measurement range: 0 to 1.000 lux

  • Noise


    Resolution: 1 dB
    Accuracy: ±5 dB
    Measurement range: 35 to 120 dB

  • Presence


    Technology: Passive infrared (PIR)
    Angle: 82° (Vertical and Horizontal)
    Detection distance: 7m


  • Connectivity

    • Smoke alarm. 10-year battery / Détecteur de fumée
  • Power supply

    1 USB-C socket

  • Conditions of use

    Indoor environment
    Temperature: -20°C to + 50°C
    Humidity: 0% RH to 99% RH (non-condensing)

  • Mounting type

    Wall-mounted or free-standing

  • Warranty

    2 years*

  • Certification

  • Set contents

    1 sensor
    1 removable stand
    1 mounting base
    1 AC adapter
    1 x 1.8m USB-C cable

    2 nylon screws and plugs
    1 3M® adhesive fastener


Reference Radio Frequency

Optimum performance

  • Very low power consumption for sensors and on-board electronics
  • Includes 1 USB-C socket for quick and easy power supply
room sensor building / capteur d'ambiance
room sensor building / capteur d'ambiance

NFC configuration: simple, fast and secure!

The Nexelec TOUCH app, combined with NFC technology, enables wireless adjustment by simply bringing a smartphone close to your sensor, making the process much simpler for users.

Over 25 configurable parameters :

  • Measurement and data transmission frequencies,
  • Indicator lights.

There’s no need to unpack ATMO, as settings can be made through the packaging, without the sensor being plugged in!

Measures ambient parameters with a single click

Need to take an immediate measurement and share the data? This is now possible and easy to do, thanks to the button on the front of the sensor

room sensor building / capteur d'ambiance
room sensor building / capteur d'ambiance

Who says an IoT sensor can't be elegant?

ATMO combines technology with a modern, minimalist design that blends harmoniously into any environment

Frequently Asked Questions

Our experts answer your questions

NEXELEC sensors are capable of measuring different pollutants, depending on the model. Depending on the country and the environment, thresholds may vary.

Depending on WHO and ANSES regulations, thresholds may differ from one country to another.

The values set out below are valid for ERP (Etablissements Recevant du Public) in France.


Carbon Dioxide (CO2)

CO2 is a good indicator of Indoor Air Quality. If ppm levels are too high, ventilate as soon as possible.

Interpretation of CO2


Volatile organic compounds (VOCs)

These compounds are emitted by paints, glues and other solvents. If the concentration is too high, ventilate as soon as possible.

VOC interpretation


Fine Particles (PM)

PM are grouped into 3 categories: PM1, PM2.5 and PM10

Fine particles are often found in dust and smoke. Prolonged exposure presents a health risk. When the threshold is too high, open the windows to renew the indoor air.

Interpretation of PM


Formaldehyde (HCHO)

Formaldehyde can be found in new furniture, cleaning products and so on. If your detector emits a Red LED, take action as soon as possible.

Interpretation of HCHO


Carbon monoxide (CO)

If carbon monoxide levels reach excessive levels in a room, it presents a potentially fatal hazard. It’s crucial to detect the origins of CO in the environment, and to have all combustion appliances inspected, such as stoves, boilers, stoves and so on. If the threshold is too high, ventilate the room as much as possible.

Interpretation of CO

NFC (Near Field Communication) is a magnetic field technology used to exchange data between a product and a smartphone.

To configure the product, simply :

  • Download the free Nexelec TOUCH application from Google Play Store or Apple App Store
  • Select product and follow application instructions

A presence detector is a device that detects the presence of people in a given area for a defined period of time. NEXELEC presence sensors are designed to react quickly to movements and provide precise data on the actual occupancy level of spaces.

Generally speaking, at 80 dB and above, the danger threshold is considered to have been reached after 8 hours of noise exposure. Above 130 dB, any exposure to noise, even short-term, is considered highly harmful.

NEXELEC noise sensors measure the sound environment in interior spaces, helping to ensure the well-being of occupants.

In any indoor environment, lighting plays a crucial role in the productivity, concentration and well-being of occupants. Good lighting can boost energy, improve mood and reduce eyestrain.

Measuring brightness is therefore essential to guarantee the visual comfort, safety, energy efficiency and functionality of interior spaces.

*Please refer to the information available on the website.