Trusted for a century, TSI Inc. is excited to celebr...
TSI introduces a new range of AeroTrak+ Remote Airbo...
TSI’s SidePak AM520i Personal Aerosol Monitor is the...
TSI employees work in product development, manufacturing and customer support in facilities on three continents and using over 425,000 square feet of building space. Our corporate sales and service offices provide regional customer support. Our network of knowledgeable distributors and manufacturers’ representatives provide local support worldwide.
Our locations include:
TSI has three wholly owned subsidiaries:
DICKEY-john® Corporation (Auburn, Illinois), a manufacturer of specialized instrumentation used in public works and agriculture.
Environmental Systems Corporation (Knoxville, Tennessee), a leading supplier of products and services for outdoor environmental monitoring.
Tekran® Instruments Corporation (Knoxville, Tennessee), a premier supplier of ambient mercury monitoring technology.