Indoor air quality sensor ATMO

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Product overview
ATMO by Nexelec is a 10‑in‑1 indoor ambient sensor for continuous monitoring and remote reading of air quality parameters. It embeds the iZiAiR analysis algorithm, supports LoRaWAN connectivity and NFC configuration via the Nexelec TOUCH app for on‑site setup.

Key features

• On‑board analysis and secure cloud access for remote measurement reading and storage.
• Compact, unobtrusive design with a 3 cm diameter mounting base for discreet indoor installation.
• Air 360° detection with large rear openings to ensure rapid gas flow and reliable sampling.
• NFC configuration: smartphone setup with Nexelec TOUCH; more than 25 configurable parameters.
• iZiAiR algorithm: evaluates up to 9 pollutants simultaneously and prioritises hazardousness.
• Optimised LoRaWAN transmission with PCB antenna and transmission modes (Historical Data / Periodic Send).
• End‑to‑end cybersecurity using dual AES128 encryption.
• Flexible installation: free‑standing or wall‑mounted; adhesive mount and lockable base included.

Measured parameters (sensors)

• Formaldehyde (HCHO) — electrochemical, factory calibrated
• Particulate Matter — optical PM sensor (PM1, PM2.5, PM10)
• Carbon Dioxide (CO2) — dual‑channel NDIR
• Total Volatile Organic Compounds (TVOC) — MOx detection
• Temperature
• Humidity
• Atmospheric Pressure
• Brightness (ambient light)
• Noise (sound level)
• Presence (PIR)

Formaldehyde sensor
Factory‑calibrated electrochemical HCHO sensor optimised for low concentration detection near WHO reference values, with low cross‑sensitivity to other VOCs and real‑time measurement for occupant and building protection.

Particulate Matter (PM)
Optical laser‑scattering PM sensor discriminates PM1, PM2.5 and PM10. Durable components ensure long‑term accuracy (service life > 10 years), supporting exposure assessment and corrective actions (ventilation, filtration, purifiers).

CO2 and visual indicator
Dual‑channel NDIR CO2 measurement (typical periodic measurement every 10 minutes) with Green/Orange/Red indicator to alert occupants when ventilation is required.

Configuration & Operation
NFC configuration via the Nexelec TOUCH smartphone app. Front button enables instantaneous measurement and sharing (can be disabled). Some settings can be applied from packaging without powering the device.

Installation & Mounting
Free‑standing on a desk or wall‑mounted. Adhesive mount included; lockable mounting base reduces theft risk. Compact base (3 cm diameter) minimises surface impact.

Set contents
1 sensor; 1 removable stand; 1 mounting base; 1 AC adapter and 1.8 m USB‑C cable; 2 nylon screws and plugs; 1 3M® adhesive fastener.

Reference
Reference — Radio — Frequency — Main areas
I665LR_FND_S — LoRaWAN — EU868 MHz — Europe / Middle East

Technical specifications

• Formaldehyde: Resolution 1 ppb; Accuracy ±20 ppb or ±20% of measured value; Range 0–10,000 ppb
• Particulate Matter: Resolution 0.1 μg/m3; Accuracy ±15 μg/m3 or ±10% of measured value; Range 0–2,000 μg/m3
• CO2: Dual‑channel NDIR; Resolution 1 ppm; Accuracy ±(30 ppm + 3% of measured value); Range 0–10,000 ppm
• TVOC: Resolution 1 μg/m3; Accuracy ±25%; Range 0–10,000 μg/m3
• Temperature: Resolution 0.1°C; Accuracy ±0.2°C; Range −30°C to +70°C (validated operation −20°C to +50°C)
• Humidity: Resolution 0.5% RH; Accuracy ±2% RH; Range 0–100% RH (non‑condensing)
• Atmospheric pressure: Resolution 1 hPa; Accuracy ±2.5 hPa; Range 300–1,100 hPa
• Brightness: Resolution 5 lux; Accuracy ±5 lux; Range 0–1,000 lux
• Noise: Resolution 1 dB; Accuracy ±5 dB; Range 35–120 dB
• Presence (PIR): Angle 82° vertical & horizontal; Detection distance up to 7 m
• Dimensions: 105 x 105 x 30 mm
• Power supply: USB‑C socket; AC adapter and 1.8 m USB‑C cable included
• Operating conditions: Indoor; Temperature −20°C to +50°C; Humidity 0% to 99% RH (non‑condensing)
• Connectivity: LoRaWAN (EU868 for this reference); Optimised PCB antenna; transmission modes to limit data loss
• Calibration certificate: CO2, temperature and humidity validated by a COFRAC‑accredited metrology laboratory
• Warranty: 2 years