Swisens Poleno

Swisens Poleno is based on ground breaking technology for the precise and reliable identification of airborne particles and aerosols. It is specially optimized for the identification of pollen-taxa in real-time and for the long-term monitoring. Swisens Poleno marks the beginning of a new era for the measurement of bioaerosols. - Swisens goes beyond details

Automatic pollen monitoring - Swisens Poleno is designed for the fully automatic and continuous monitoring of the concentration of the different pollen-taxa in the air relevant to people with allergies.

Pollen-taxa prediction modeling - Particle identification within seconds allows for the calculation of the actual local pollen-taxa concentration with a time resolution in the range of minutes. This data can be used as input for pollen forecasts and numerical models.


  • Outstanding pollen-taxation
  • High time-resolution
  • Low operation costs


  • Holographic images
  • Integrated aerosol concentrator
  • Insertable sample collector

Overall Benefits

Better and reliable quality of pollen-taxa data
Swisens Poleno provides the most independent characteristic values per particle available on the market. It renders a mosaic of information about the particles going through the system including high-resolution images of every single particle. Based on this rich dataset and in combination with state-of-the-art classification algorithms, outstanding quality of the classification results is achieved. Thanks to the images, the verification of the measurement from every single particle can be made simply and intuitively.

High resolution local pollen-taxa concentration
The unique aerosol-concentrator of Swisens Poleno enables an unprecedented time resolution. Based on the information provided by the instrument in real-time, the beginning of the pollen release can be detected instantly, and daily as well as seasonal fluctuations of pollen concentration can be tracked. The real-time data with a time resolution in the range of minutes can be used to improve pollen prediction, detect local hot-spots and measure the local temporal fluctuations of pollen concentration.


Real-time data of local pollen concentration
The time-consuming and expensive manual identification and counting of pollen in the laboratory as well as the collecting and shipping of adhesive sampling stripes from the classic Hirst-type pollen traps will be obsolete. The sampling and identification of particles is done by the instrument autonomously. Manual labor is no longer necessary. The raw data as well as analysis results can be obtained instantly using a network connection.

Low operation costs
The whole measurement equipment in Swisens Poleno is semiconductor-based and does not require periodical replace- ment. The device is designed for an operating time of at least ten years and a maintenance interval of nine to twelve months depending on the air pollution.

Integrated removable sample collector
To examine the system‘s performance and to validate its functions, a petri dish can be inserted into the measuring channel as an impaction filter. Aspirated particles accumulate on it and can then be evaluated manually and compared with the data measured by the device.

Function principles

Swisens Poleno is an air-flow cytometer based on the analysis of light scattering, holographic images and UV-induced fluorescence. With these measurement methods, many independent features can be determined, allowing for excellent quality of particle identification.

A built-in aerosol concentrator enables a large air flow to be analyzed, which makes it possible to determine local pollen concentrations with a high time resolution down to minutes.

Morphological features
Information about the morphology of each individual pollen grain is collected with a high-resolution holography setup delivering images of the particles. The advantages of the setup include a wide field of view in x, y and z-axis while maintaining a very high resolution. The figures on the right show reconstructed images of pollen grains taken in flight with the holography measurement setup.

The time-resolved measurement of the vertical and horizontal polarized scattered light provides information about the surface structure, size and the degree of polarization.

Biochemical composition
Complementary information in addition to the morphological features is collected by spectrally resolved fluorescence intensity and fluorescence lifetime measurements. This characteristic value delivers an additional dimension of information and allows for the extremely accurate identification of the different pollen-taxa.

Ambrosia (ragweed)
Corylus avellana
Corylus avellana (hazel)
Quercus robur
Quercus robur (oak)
Fagus sylvatica
Fagus sylvatica (beech)

More information

The full technical details of Swisens Poleno are not currently published online, but a preliminary device datasheet is available on request. If you are interested in more information, please feel free to send us a note either using our contact form, or by direct e-mail.


The information presented in this document is based on Swisens‘ experiences and compiled to the best of Swisens knowledge. Although care has been taken in compiling the information, Swisens does not assume liability for its completeness or accuracy. The information, recommendations and examples presented in this document do not absolve you from the obligation of investigating the possibility of infringement of third parties‘ rights and, if necessary, clarifying the position. The information is provided by Swisens „AS IS“ and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose of information or the product or both, are disclaimed. Except to willful acts and to the maximum extent permitted by applicable law, in no event shall Swisens be liable for any direct, indirect, incidental, special, exemplary or consequential damages, procurement of substitute goods or services, claims of intellectual property infringement or loss of use, data, profits, or business interruption, or harmful effects to people, objects, animals, or physical entities, however caused and on any theory of liability whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of the information or the product or both, even when advised of the possibility of such damage. Swisens reserves the right to make changes to this document without notice at any time. All trademarks are the property of their respective owners.