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TSI is a leader in manufacturing high-precision test instruments for the HVAC, Industrial sector, and Contamination Control as well, TSI Inc. serves a global market by investigating, identifying, and solving measurement problems.

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, and fluid dynamics.

TSI headquarters is based in the USA and has field offices throughout Europe and Asia.