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


The AQ Guard Smart 2000 is a measuring device designed to measure particle concentrations in the ultra-fine 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 ultra-fine 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.

AQ Guard Smart 2000 for ultra-fine particles closes the gap between classical condensation particle counters and optical systems. Long-term measurements for the evaluation of number concentrations in outdoor areas, but also in indoor buildings 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).


  • 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 Particle concentration CN, LDSA (Lung deposited surface area)
Measurement range (number CN) > 1000 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 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
  • Construction site and remediation areas
  • Immission monitoring of industrial plants
  • Urban air quality monitoring
  • Supplementary measurement of UFP concentrations at traffic-rich sites



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