Nexelec ATMO+ 10-in-1 Room Sensor

The Nexelec ATMO+ is a 10-in-1 LoRaWAN room sensor that measures formaldehyde (HCHO), fine particulate matter (PM1, PM2.5, PM10), CO2, TVOC, temperature, humidity, atmospheric pressure, presence, brightness, and noise in offices, homes, and other indoor environments. ATMO+ is powered entirely by USB-C — no batteries required. All measurements transmit wirelessly to a secure cloud platform for remote monitoring and data logging.

ATMO+ adds a factory-calibrated electrochemical formaldehyde sensor to the SENSE+ platform, making it the most comprehensive room sensor in the Nexelec range. The iZiAiR on-board algorithm and built-in E-Ink display provide occupants with immediate, clear readings of all ambient parameters. A color-coded indicator light and audible signal alert when ventilation is needed. Configuration is done wirelessly via NFC using the Nexelec TOUCH smartphone app — no tools, no wiring, no need to open the enclosure.

Key Features

• Formaldehyde measurement (HCHO): Factory-calibrated electrochemical sensor, resolution 1 ppb, accuracy ±20 ppb / ±20% of measured value, range 0–1,000 ppb. Optimized for accurate detection of low HCHO concentrations around WHO reference values; low cross-sensitivity to other VOCs. Formaldehyde is frequently present in indoor air from coatings, flooring, and furniture, and is a potentially carcinogenic compound.
• Fine particle measurement (PM): Laser optical sensor, resolution 1 µg/m³, accuracy ±15 µg/m³ or ±10% of measured value, range 0–2,000 µg/m³. Measures PM1, PM2.5, and PM10 concentrations individually.
• TVOC measurement: MOx (metal oxide) sensor. Reports a VOC air quality index (0–500): 0–100 indicates improving IAQ; 100–500 indicates deteriorating IAQ. Quickly detects excessive VOC concentration levels and supports real-time ventilation control.
• CO2 measurement: NDIR sensor, resolution 1 ppm, accuracy ±(50 ppm + 3% of value), range 0–10,000 ppm. Analyzes air every 5 minutes; automatic weekly recalibration; manual calibration also possible.
• Temperature measurement: Resolution 0.1°C, accuracy ±0.2°C, range −30°C to +70°C
• Humidity measurement: Resolution 0.5% RH, accuracy ±2% RH, range 0–100% RH
• Atmospheric pressure: Resolution 1 hPa, accuracy ±0.2 hPa, range 300–1,100 hPa — supports weather change detection and HVAC optimization
• Presence detection: Passive infrared (PIR) motion sensor, 82° detection angle (vertical and horizontal), detects people up to 7 m away
• Brightness measurement: Resolution 5 lux, accuracy ±5 lux, range 0–1,000 lux — useful for lighting control or temperature adjustment based on sunshine levels
• Noise measurement: Resolution 1 dB, accuracy ±5 dB, range 35–120 dB — identifies noise pollution to help preserve a calm environment
• VAPE detection: The PM and VOC sensors together enable reliable and rapid detection of smoke from cigarettes and e-cigarettes — ideal for rental properties, hotels, schools, and any space where smoking bans need to be enforced.
• iZiAiR air quality algorithm: On-board algorithm analyzes up to 9 pollutants simultaneously, measures the concentration of each, and prioritizes their hazardousness to simplify interpretation and guide appropriate action.
• CO2 indicator light: Green/Orange/Red LED visible from over 10 m changes with CO2 level to alert occupants when ventilation is needed. ppm trigger threshold is reconfigurable via NFC or remotely via LoRaWAN.
• Audible signal tone: Notifies occupants when indoor air quality deteriorates. Can be activated or deactivated locally or remotely.
• E-Ink screen: Displays current ambient measurements directly on the sensor. Low power consumption, high readability even in direct sunlight, no reflections or excessive brightness. Screen layout is fully configurable locally via NFC or remotely via LoRaWAN.
• Local data storage: Built-in micro SD card stores up to 10 years of measurements — data is preserved in the event of a network outage or power cut.
• USB-C powered: Universal connector for continuous mains power. No batteries required or included. 1.8 m USB-C cable included.
• LoRaWAN connectivity: LoRaWAN only (X260LR)
• Multi-band LoRaWAN: Configurable for EU868, US915, AU923, and other regional frequencies via NFC
• NFC configuration: Over 25 parameters adjustable via Nexelec TOUCH app — measurement interval, transmission interval, LED/buzzer indicators, radio frequency band, and more. Settings can be made through the packaging before first power-up.
• Data transmission modes: Periodic, on-change, and bundled datalog with redundancy (each frame sent three times to maximize gateway reception)
• End-to-end encryption: Double AES-128 encryption on all transmitted data
• On-demand measurement: Front button triggers an immediate measurement and data transmission
• Anti-tamper: Lockable mounting base; alert message sent if the sensor is removed
• Mounting: Free-standing, wall-mounted (screws/plugs included), flush-mounting box compatible, or 3M adhesive fastener (included) — no drilling required
• 270° air circulation: Numerous side openings for better ambient air sampling
• Insect barrier: Integrated pest screen protects the sensing chamber
• Calibration: Calibration certificate for CO2, temperature, and humidity measurements from a COFRAC-accredited independent metrology laboratory
• Regulatory compliance: Direct-reading NDIR CO2 sensor compliant with French and international standards for measuring CO2 concentration in indoor air
• Certifications: CE, UKCA, FCC

Applications

• Comprehensive indoor air quality monitoring in offices, classrooms, and public buildings
• Formaldehyde monitoring in newly built or renovated spaces, schools, healthcare facilities, and spaces with new furniture or flooring
• Fine particle monitoring in spaces with dust, combustion, or printing equipment
• VOC exposure monitoring in offices, workshops, and spaces with chemical or cleaning product use
• Cigarette and e-cigarette smoke detection in rental properties, hotels, and schools
• Ventilation control and HVAC automation based on CO2, HCHO, VOC, PM, and pressure
• Lighting and energy optimization based on presence and brightness
• Acoustic monitoring and noise pollution management
• Regulatory compliance monitoring for indoor air quality standards
• Permanent installations where mains power is available
• Facility management and building automation
• Large-scale IoT sensor deployments via LoRaWAN networks
• Integration with NAVIXIS IoT platform for dashboard visualization, threshold alerts, and data export

Important Notes

• Intended for indoor use only. Operating range: 0°C to +40°C, 0–99% RH non-condensing. Note: the upper operating temperature limit is +40°C — lower than other sensors in this range — due to the formaldehyde sensor's operating constraints.
• ATMO+ requires continuous USB-C mains power. No batteries are included or supported. A mains power outlet or USB power supply must be available at the installation site.
• NDIR CO2 sensor requires a minimum ambient CO2 level of about 400 ppm for several consecutive hours to maintain automatic recalibration accuracy. Suitable for offices, classrooms, and shared spaces; not recommended for spaces that are never unoccupied or never ventilated.
• The TVOC sensor uses MOx technology and reports a relative air quality index (0–500), not an absolute concentration in µg/m³. MOx sensors respond to a broad range of volatile organic compounds; they do not identify or quantify individual compounds.
• The formaldehyde sensor uses electrochemical technology and is factory-calibrated. It measures HCHO specifically, with low cross-sensitivity to other VOCs.
• ATMO+ supports LoRaWAN only. There is no Sigfox variant.
• LoRaWAN gateway and network server not included. A LoRaWAN network must be available at the installation site.
• NFC configuration requires the free Nexelec TOUCH app (Android or iOS).

Specifications

Technical Documents

• DataSheet
• Technical Guide (LoRaWAN)

Contact us if you need a different connectivity and frequency band option.

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