AQ Guard Smart 1100

Air quality analyzer for monitoring fine particulate matter and pollutant gases (PM1, PM2.5, PM4, PM10, TSP, SO2, NO2, O3, CO) under demanding environmental conditions


AQ Guard Smart 1100

Air quality analyzer for monitoring fine particulate matter and pollutant gases (PM1, PM2.5, PM4, PM10, TSP, SO2, NO2, O3, CO) under demanding environmental conditions

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AQ Guard Smart 1100 is a compact and cloud-enabled air quality measurement device. The system is designed for the requirements of outdoor air measurement in the smart city environment to improve granularity while maintaining high comparability to official measurements for environmental monitoring and health protection.

The simultaneous measurement of pollutant gases makes the device perfect for measuring in environmentally sensitive areas, especially where they are already common or required by law.


  • MCERTS indicative

Air quality analyzer for monitoring fine particulate matter and pollutant gases

The system works on the principle of 90-degree scattered light measurement on the single particle, based on the EN 16450 certified Fidas® 200 technology® 200. Signal duration and shape are taken into account.

The instrument's calibration can be checked and, if necessary, adjusted quickly and easily at any time, even when installed, using a monodisperse test aerosol.

AQ Guard Smart 1100 is suitable for outdoor use under extreme conditions. It has proven its performance under a wide range of meteorological conditions.

For better utilization of its heat, the heated inlet is located inside the housing and is dynamically switched on depending on the humidity and temperature.

The AQ Guard Smart System has Ethernet, WLAN, and cellular connectivity and supports ASCII and MODBUS protocols for communication. All data is continuously recorded and can be retrieved retrospectively and in real-time.

The AQ Guard Smart 1100 supports model calculations of the current fine dust pollution and forecasts. These will be based on stricter limit values in the future, requiring lower uncertainties for local measurements.

The AQ Guard Smart 1100 offers manufacturers and users of low-resolution sensors a comparison option and, thus, a plausibility check before the measured values are made available for further processing in formation and dispersion studies.

Sensors that measure temperature, humidity, and pressure are integrated as standard. Other gas sensors for measuring the pollutant gases NO2, SO2, O3, and CO are integrated, which can provide additional information about the particle origin.



AQ Guard Smart 1100 can be connected to the cloud platform MyAtmosphere . Private and government operators can retrieve current readings directly without delay. Furthermore, the data can be compared with the measured values of other devices. MyAtmopshere can be integrated into its systems/environments via an optional programming interface (API).

Weather station

To better understand the fine dust input and its cause, the device is optionally available with a corresponding weather station, which provides supplementary meteorological information.


AQ Guard Smart System has a pole or tripod mount and can be extended with a sunshade and LoRa modem if required. AQ Guard Smart auf einem Tripod

Fig. 1: AQ Guard Smart on a tripod


  • Technology based on the certified Fidas® 200 series (EN 16450 and MCERTS)
  • Simultaneous measurement of PM1, PM2.5, PM4, PM10, CN with high temporal resolution
  • Additional SO2, CO, NO2, O3 measurement
  • Easy and fast installation
  • Data visualization via cloud MyAtmosphere
  • Communication via GPRS / 3G / 4G / Ethernet / Wi-Fi, optional: LoRaWAN
  • Extendable with weather station / solar protection


Measurement range (number CN) 0 – 20,000 particles/cm³
Size channels 64 (32/decade)
Measurement range (size) 0.175 – 20 µm
Measuring principle Optical light scattering at single particles
Reported data PM1, PM2.5, PM4, PM10, TSP, CN, particle size distribution, ambient pressure, ambient temperature, rel. ambient humidity, SO2, CO, NO2, O3
Measurement range (mass) 0 – 100 mg/m3 (depending on the composition of the aerosol)
Measurement uncertainty < 15 % for PM2.5, < 20 % for PM10 (expanded measurement uncertainty according to EN 16450, corrected – MCERTS)
Time resolution 1 min, moving average 1 min
Light source Long term stable LED
Power consumption Standard operation: 1.2 A (1.7 A with additional heating)
Weight Approx. 6 kg
Response time < 3 s (gas sensor)
Installation conditions -20 – +50 °C
Interfaces USB, Ethernet (LAN), Wi-Fi, 3G/4G via Modem, optional: LoRaWAN
Power supply Supplied power supply: 12 V
Special features Heated inlet, Accessories: Mast / tripod mount, optional: weather station, sunshade, LoRa modem
Dimensions 530 • 270 • 208 mm (H • W • D)
Resolution 0.01 ppm (gas sensor)
Datenmanagement Cloud connection to MyAtmosphere (separate registration necessary; cloud license fees may apply or SIM card required)
Repeatability < 2% (gas sensor)
Long-term drift < 1% / month (gas sensor)

Case Studies

  • Urban air quality monitoring
  • Smart city projects
  • Open pit mining and landfills
  • Formation and dispersion studies
  • Construction sites
  • Immission monitoring of industrial plants
  • Measurement of dust emissions from road and rail traffic as well as ports
  • Risk areas (natural and anthropogenic)

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