Founded in the United States, the world's leading air testing instrument service provider, and an industry leader in the design and production of precision instruments, TSI Instrument Trading (Beijing) Co., Ltd. is TSI's agent in China

TSI Inc. researches, confirms, and solutions to measurement challenges for customers around the world. As a leader in the design and manufacture of precision measurement instruments, TSI works with research institutes and customers around the world to develop standards for measurement instruments in a wide range of disciplines, including aerosol science, airflow, indoor air quality, fluid dynamics, and biohazmat. With its headquarters in the U.S. and local offices in Europe and Asia, TSI has a presence in every corner of the world. Every day, our dedicated employees turn research findings into reality.  

TSI has more than 500 dedicated employees worldwide in offices in North America, Europe and Asia. The company's sales and service outlets (St. Paul, Minnesota, USA; Aachen, Germany; Colbber, Highway, England; Beijing, China; Shanghai, China; Singapore, as well as Bangalore, India, etc.) to support local customers. We also have experienced vendor representatives and a network of distributors to support our customers around the world. 

TSI has three wholly owned subsidiaries:  

DICKEY-john® Corporation (Auburn, Illinois) is a manufacturer of utility and agricultural specialty instruments  

Environmental Systems Corporation (Knoxville, Tennessee), a leading provider of outdoor environmental monitoring products and services.  

Tekran® Instruments Corporation (Knoxville, TN), a leading supplier of environmental mercury monitoring technology.  

The company has more than 425,000 square feet of space dedicated to product development, manufacturing, and customer support. 

Track record of technological innovation 

TSI's R&D staff and engineers have been awarded more than 50 patents, and their research and development results are recognized as second to none in the industry. Various associations, as well as standards committees, have long had TSI precedence. Our engineers sit on or chair committees such as the National Society of Heating, Refrigerating and Air-Conditioning Engineers, the American National Standards Institute, the American Industrial Hygiene Association, and the American Association for the Study of Aerosols*. 

Our employees and products are involved in tackling current global issues such as diesel engine exhaust emission reduction, biochemical hazard protection, homeland security, environmental pollution, working environment and equipment testing. The data measured by the instruments produced by the company is used in monitoring and research equipment that has a long-term impact on people and the planet. 

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), American National Standards Institute (ANSI), American Industrial Hygiene Association (AIHA), and American Association for Aerosol Research (AAAR).