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TSI Inc.

TSI Incorporated serves a global research market to identify and solve problems in the measurement of (nano)particles and Ultrafine Particles (UFPs).



About TSI Inc.

As leading company in the design and manufacture of precision measurement instruments, TSI works with research institutions and customers around the world to set the standard for measurements related to aerosol science, particulate matter, airflow, air quality, filter testing and biohazard detection. With headquarters based in the U.S., and offices across Europe and Asia, TSI has a global market presence. Every day, TSI’s dedicated employees turn research into reality.

TSI Particle Counters and Sizers can detect particles as small as 1 nm in size.

j.j. bos b.v. has been recognized as TSI Gold Sales business partner for Benelux since 1972 and has a wide range of demonstration instruments, such as:

  • Condensation Particle Counters (CPC, model 3007, 3750 and 3783);
  • Scanning Mobility Particle Sizer (SMPS, model 3910 and 3938)
  • Opticle Particle Sizer (OPS, model 3330);
  • Aerodynamic Paricle Sizer (APS, model 3321)
  • Nanoparticle Emission Tester (NPET, model 3795)


Delivery of Topas Dust generator for exploring the moon

The European Space Agency (ESA) in Noordwijk, the Netherlands, is preparing for a moon landing. Part of the research and testing concerns […]

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WHO Guidelines regarding PM, PN and UFP’s

e are pleased to inform you about the new Particulate Matter (PM) and Particle Number Concentration (PN) threshold values as published by […]

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New CPC validation setup

Based on the Topas FCS-249 aerosol generator and a TSI 3750 reference CPC, j.j. bos has commissioned a setup to check and […]

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Google air view
Google Street View car monitoring air quality

Since a few months you may encounter 2 Google Street View cars in the Amsterdam area to map the air quality at […]

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