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TSI

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TSI is a manufacturer of precision measurement instruments with over 50 years of experience. The company is the professional’s choice for highly accurate, American-made instruments.
 

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About

The Professional's Choice.

TSI is an American company based in Minnesota. The company has been manufacturing high accuracy measurement instruments in America for over 50 years. Today TSI primarily focuses on instruments for aerosol sciences, air flow measurement, indoor air quality, health and safety, fluid dynamics and biohazard detection. Of these TEquipment carries particle analyzers for research, environment and contamination, industrial air flow test instruments, and indoor air quality (IAQ) tools for air quality and HVAC testing. Many of these instruments carry the Alnor name, a brand within TSI with a reputation for high-quality air velocity tools. TSI employees are experts in their fields and regularly work alongside those in the scientific community to develop innovative and accurate instruments that work for you, wherever you need. Additionally TSI operates branches around the globe so sales and support is never far off.
  • Over 500 employees
  • Over 200 precision instruments and 50 patents
  • Offices in England, Germany, France, China, India, and Singapore

TSI is part of a group of companies owned by private investment firm Churchill Industries. The firm made its first acquisition in 1986 and is based in Minneapolis, Minnesota. To date the firm has managed over $1.2 billion in total investments in over 100 companies. Subsidiaries of TSI within Churchill Industries include DICKEY-john Corporation, Environmental Systems Corporation (ESC), and Tekran Instruments.

 
 

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