AQ Guard Smart 2000

Air quality analyzer for monitoring nanoparticles (UFP number concentration, LDSA-"Lung-deposited surface area") for demanding environmental conditions


AQ Guard Smart 2000

Air quality analyzer for monitoring nanoparticles (UFP number concentration, LDSA-"Lung-deposited surface area") for demanding environmental conditions

Still have questions?


The AQ Guard Smart 2000 is a measuring device designed to measure particle concentrations in the ultrafine range, which typically cannot be detected by optical aerosol photometers or spectrometers due to their small size, but which have a significant impact on health according to the WHO.

Currently, no legal regulations or limits have been established for ultra-fine particle concentrations and masses. Mass limits like PM2.5 and PM10 can be measured well with gravimetric methods, at the latest for smaller PM1 fractions of ultrafine fractions are difficult to estimate and can be evaluated meaningfully only by the determination of the particle concentration.

In this case, valuable and maintenance-intensive condensation particle counters are usually used, which in combination with a size-classifying system (Scanning Mobility Particle Sizer) provide information about the particle size distribution and concentration.

Operating principle

AQ Guard Smart 2000 for ultrafine particles closes the gap between classical condensation particle counters and optical systems. Long-term measurements for the evaluation of number concentrations in indoor and outdoor areas, e.g. at highly polluted places like airports, main roads, forwarding agencies or also e.g. toll stations are easily and reliably possible and can already be used for the definition of avoidance and reduction measures in a meaningful and targeted way.

The cloud application MyAtmosphere created for this purpose enables both private and governmental operators to retrieve current measured values directly, to compare them with other devices without delay and further processing or to integrate them into their own systems/environments via an optional programming interface (API).


AQ Guard Smart 2000 has an optional mast or tripod mount and can be expanded to include a weather station, sunshade, and LoRa modem if needed.


  • Simple and accurate monitoring of particle number concentration of UFP
  • Affordable and low maintenance, no working fluid
  • Flexible use indoors and outdoors
  • High temporal resolution
  • Versatile data transmission options


Measuring principle Diffusion charging
Reported data CN,average diameter X50,LDSA (Lung Deposited Surface Area),ambient pressure, ambient temperature, rel. ambient humidity
Measurement range (number CN) 1,000 – 10,000,000 particle/cm3

Measurement range (size) starting from 0.010 µm
Weight Approx. 6 kg
Installation conditions 0 – +40 °C
Interfaces USB, Ethernet (LAN), Wi-Fi, 3G/4G via Modem, optional: LoRaWAN
Protocols UDP, ASCII, Modbus
Special features Heated inlet, Accessories: Mast / tripod mount, optional: weather station, sunshade, LoRa modem
Dimensions 530 • 270 • 208 mm (H • W • D)
Data management Cloud connection to MyAtmosphere (separate registration necessary; cloud license fees may apply or SIM card required)


  • UFP concentrations in and around airports and seaports
  • Formation and dispersion studies
  • Immission monitoring of industrial plants
  • Urban air quality monitoring
  • Supplementary measurement of UFP concentrations at traffic-rich sites


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