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TSI Inc.

Precision Measurement Tools, with Unsurpassed Accuracy and Reliability

TSI Incorporated doesn't just observe and react to measurement trends. We set them. For more than half a century, we have investigated, identified and provided performance measurement solutions by taking on the difficult problems and providing the tools for further research. We have partnered with research institutions worldwide to develop the most efficient performance measurement tools.

At TSI, our team of more than 500 employees maintains a relentless focus on quality. Our solutions are research-driven and field-tested. Particle and aerosol research requires instruments with accurate, consistent and reliable results. We equip you with tools you can trust every time.

Our global customer base trusts TSI to produce the most accurate precision measurement instruments in the industry. For this reason, we emphasize accuracy at every level from particle size to speed, shape to composition. Our customers can be confident in the accuracy of their results.


500 Cardigan Road
Shoreview, MN 55126
Phone: 800-874-2811
Fax: 651-490-3824