passam ag


We are an accredited testing laboratory for air quality of ambient, indoor and workplace atmospheres by diffusive samplers and analysis with the help of spectrophotometry, gas and ion chromatography in accordance with Standard ISO/IEC 17025 based in Switzerland.

tmpOur main objective is to manufacture effective diffusive samplers and to provide analytical data that is reliable, amenable to statistical evaluation, technically sound and defensible and is provided in a cost effective and efficient manner depending on our clients’ individual needs. Our emphases are:

  • Long-term comparability of results; internal procedures and recording enables constistent data over time.
  • Treacability; the analytical chain is based on certified reference materials and traceable to national bodies.
  • Transparent evaluation of measuring uncertainties: the whole analytical chain is regularly verificated by using controlled test-atmopheres. Uncertainties are assessed according to GUM.


passam ag was founded as an ETH spin-off by Dr. Markus Hangartner and Andrea Hangartner. We operate as an independent company located in Männedorf, Switzerland.


Based in Switzerland, we are currently active in 50 countries across the world. With environmental concerns rising faster and faster, our services are needed throughout the world, both in order to assess the situation in different nations as well as to make sure that we can take the corrective steps to ensure a better future.



Passive samplers are an effective tool in the air environment to determine time-weighted averages of concentration levels of dissolved air pollutants. Passive samplers prove to be optimal devices for the measurement of long term and cumulative concentrations in remote and inaccessible areas eliminating errors caused by short-term variations in concentrations. The aim of this reference study conducted by the Swiss Federal Institute for Forest, Snow […]

Calibration of dispersion models

Dispersion models are an important tool in air quality management as they combine topographic data, emissions – and meteorological data. However, their quality heavily depends on the availability and reliability of the above mentioned input parameters. For sites where those input parameters are not precise enough, diffusive sampler allow assessing the spatial distribution of the air pollution in a convenient and cost effective manner. Due […]

Following trends

The evaluation and observation of air quality trends in air pollution is crucial to understand the effectiveness and efficiency of air protection measures, to quantify emission factors, to determine standards and to support decision makers in their actions. Due to their reliability, cost effectiveness and power free and light weight installation passive samplers are an important and cost effective tool to identify and follow such […]

Hot Spot Mapping

Spatial data analysis by the means of geographic maps is a usefull tool to better understand the studied and measured phenomena. We use different geographic visualization techniques to reveal spatial releationships between hot spots and monitoring stations, to allow classifications including thresholds, classify zones or to help communicate a specific situation. The density of the sampling sites significantly influences the quality and reliability of such […]


Exibition at the 22st Oil, Gas and Petrochemical Exhibition in Tehran

Exibition at the 22st Oil, Gas and Petrochemical Exhibition in Tehran

The 22st Oil, Gas and Petrochemical Exhibition IRAN OIL SHOW 2017 took place in the beginning of Mai in Tehran.  We would like to thank all participants, visitors and especially our exclusive partner A. B. Sangari & Sons Ltd. for this great event.                                        We are already looking forward […]

Validation study of ammonia diffusive and active samplers at NPL

Validation study of ammonia diffusive and active samplers at NPL

The first results from the conducted ammonia validation study under the supervision of the National Physical Laboratory (NPL), Environment Division, in the United Kingdom are getting published. We would like to thank the NPL for the great work and are convinced that this study will contribute to significantly improve the reliability of measurements in the field. The abstract can be found here.

NO2/ PM10 study published from Dehli and Kanpur, India

NO2/ PM10 study published from Dehli and Kanpur, India

A fast growing population coupled with industrialization, urbanization and high levels of energy consumptions is worsening the air quality particularly in developing countries. NO2 is regulated in most of the countries and is used as an indicator to assess the status of ambient air quality in the urban environments such as Dehli, India. Passive sampling with NO2 samplers was conducted at 204 and 101 sampling locations in […]

passam ag
Schellenstrasse 44
CH-8708 Mannedorf Zurich

phone: +41 44 920 46 44
fax: +41 44 920 24 97


Where can the specifications of each sampler be found?

All specifications are available upon request. Please contact us directly. Soon they will be also available in the download section.


How long till delivery?

We are able to ship around 2 weeks after placement of order.


What is the custom tarif number?

The HS code for our passive samplers is 3926.9000


From where is the Certificate of Origin?

All our products and services are of Swiss preferenential origin.


Are further information sheets available?

Upon request, the following information sheets can be provided:

  • about monitoring strategy
  • effects of temperature and wind on the sampler performance
  • uncertainity calculations
  • sampling rates
  • working ranges
  • volatile organic compounds


LANUV membranes

We strongly reccmmend  to use LANUV membranes at highly wind- and or traffic exposed monitoring sites. Further information is available upon request.