TSI Inc. 

TSI Inc. serves a global market by investigating, identifying and solving measurement problems. As an industry leader in the design and production of precision measurement instruments, TSI partners with research institutions and customers around the world to set the standard for measurements relating to aerosol science, air flow, indoor air quality, fluid dynamics and biohazard detection. With headquarters based in the U.S. and field offices throughout Europe and Asia, TSI has established a worldwide presence in the markets we serve. Every day, our dedicated employees turn research into reality. 


TSI has a worldwide presence with over 500 dedicated employees working in facilities in North America, Europe and Asia. Our corporate sales and service offices (St. Paul, Minnesota, USA; Aachen, Germany; High Wycombe, United Kingdom; Beijing, China; Shanghai, China; Singapore, and Bangalore, India) provide regional customer support. We also maintain a network of knowledgeable manufacturers’ representatives and distributors to provide local support worldwide.

TSI researchers and engineers have been granted more than 50 patents and have a proven record of developing instruments that are the first, the only, and the best of their kind. Participation in societies and standards committees has long been a TSI priority. TSI’s products are involved in current global issues, such as diesel engine exhaust reduction, biohazard protection, homeland security, environmental pollution, workplace comfort and facility monitoring.

The team at TSI are dedicated to manufacturing application-specific instruments that help advance the industries we serve.

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