TSI Incorporated
TSI Incorporated is a privately held U.S. precision measurement instrumentation manufacturer founded in 1961, serving twelve verticals including HVAC, occupational health, cleanroom, life sciences, and research with proprietary sensor-based instruments, the TSI Link SaaS platform, and a global direct-and-distributor sales network.
- Company typePrivate
- Founded1961
- HeadquartersMinnesota City, United States
- Headcount501–1,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What TSI Incorporated does
TSI Incorporated is a privately held U.S. precision measurement instrumentation manufacturer founded in 1961 and headquartered in Shoreview, Minnesota, with 501-1,000 employees and wholly-owned sales entities in France, Germany, and the United Kingdom. The company designs and builds sensor-based instruments for aerosol science, particle counting and sizing, airflow and ventilation measurement, indoor and outdoor air quality monitoring, cleanroom contamination control, respirator fit testing, noise dosimetry, and heat stress monitoring. Its core technology combines proprietary sensor designs, data acquisition electronics, and analytical software, organized around a hardware-plus-platform-plus-services architecture that increasingly ties installed instruments to the TSI Link cloud software environment. The product portfolio spans flagship brands such as PortaCount, DustTrak, OmniCount, BioTrak, VelociCalc, OmniTrak, and the acquired Quest, Casella, and MSP lines.
TSI generates revenue through three primary streams: (1) hardware sales of precision measurement instruments sold direct to enterprise accounts and through a global distributor network; (2) recurring software and SaaS subscriptions on the TSI Link platform, including TSI Link Smart Bridge for DustTrak monitors and TSI Link for Respiratory Protection; and (3) long-tail service, repair, and calibration revenue from a service organization with over 60 years of operation. The company sells into twelve vertical markets — HVAC and TAB consultants, occupational health and safety, indoor environments, electronics manufacturing, healthcare, life sciences, industrial manufacturing, emergency response and law enforcement, outdoor environments, power generation and mining, research and development, and Casella solutions — using a sales-led go-to-market model with direct enterprise field sales, inside sales support, and authorized distributors. Pricing is not publicly disclosed and is quote-driven through the sales team.
TSI Incorporated firmographics
Firmographics- Name
- TSI Incorporated
- Legal name
- TSI Incorporated
- Website
- https://tsi.com
- Company type
- Private
- Founded year
- 1961
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- TSI Incorporated is a privately held U.S. precision measurement instrumentation manufacturer founded in 1961, serving twelve verticals including HVAC, occupational health, cleanroom, life sciences, and research with proprietary sensor-based instruments, the TSI Link SaaS platform, and a global direct-and-distributor sales network.
- Ownership category
- akta.pro rank
TSI Incorporated industry classification
Industry- Product category
- Precision Measurement Instruments
- NAICS
- Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Analytical Laboratory Instrument Manufacturing (334516)
- SIC
- Industrial Instruments For Measurement, Display, And Control (3823), Laboratory Analytical Instruments (3826), Services-Testing Laboratories (8734)
- akta.pro primary industry
- Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH)
- akta.pro secondary industries
- Indoor Air Quality (IAQ) Testing & Monitoring (HSAOAIAD), Testing, Inspection, Certification & Commissioning (TICx) Technical Services (BPAHAIAL)
Keywords
Where TSI Incorporated is headquartered
LocationHeadquarters
- HQ city
- Minnesota City
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
TSI Incorporated business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Supply Chain, Operations, Marketing or Sales, Infrastructure
Revenue model
- Precision Measurement Instruments: TSI generates the majority of its revenue from the sale of precision measurement instruments including particle counters, air quality monitors, flow meters, ventilation testers, respirator fit testers, and noise dosimeters. Products are sold directly and through channel partners globally.
- Software and SaaS Subscriptions: TSI derives recurring revenue from software platforms including TSI Link for Respiratory Protection and TSI Link Smart Bridge. These cloud-based SaaS solutions provide remote monitoring, compliance management, and data analytics, typically sold on a subscription or license basis.
- Service, Repair, and Calibration: TSI offers instrument service, repair, and calibration through its service organization, providing recurring revenue through service plans, calibration contracts, and on-demand repairs. TSI Service has been delivering instrument service for over 60 years.
Go-to-market motion1 record
Distribution channels4 records
Marketing channels5 records
TSI Incorporated product offering
Product offeringCore offering
TSI Incorporated designs, manufactures, and services precision measurement instruments, software platforms, and calibration/repair services for laboratory and field applications. Its portfolio spans particle counters, aerosol and dust monitors, ventilation test instruments, indoor air quality meters, flow meters, respirator fit testers, noise dosimeters, and cleanroom particle counters, complemented by the TSI Link cloud software ecosystem and the OmniTrak wireless multi-parameter monitoring platform.
Product overview
TSI Incorporated offers a comprehensive portfolio of precision measurement instruments and software solutions organized as a platform-plus-modules architecture. The core offerings include particle counting and sizing instruments (OmniCount, particle counters, particle sizers), air quality monitoring systems (DustTrak, indoor air quality meters), ventilation testing equipment (VelociCalc, Airflow TA500, capture hoods), and occupational health instruments (PortaCount fit testers, noise dosimeters, heat stress monitors). The company operates through distinct divisions including its main instrumentation business and MSP Solutions focused on pharmaceutical testing. TSI Link serves as the central software platform enabling connectivity and data management across devices, while products like OmniTrak provide modular wireless solutions for multi-parameter air monitoring. Recent expansions include enhanced ventilation meters with VOC/CO2/humidity probes and new condensation particle counters.
Differentiator
Problem solved
Functional benefit
Brands
- TSI Link: Cloud-based IoT platform for device monitoring, data analysis, and respiratory protection program management
- OmniTrak
- OmniCount
- PortaCount
- DustTrak
- BioTrak
- Quest
- Casella
Products and services
- VelociCalc 9600 Series Multi-function ventilation meter for HVAC testing, cleanroom testing, and biological safety applications, supporting four duct traverse methodologies including ASHRAE 111 and EN standards.
- Airflow TA500 Multi-function ventilation meter for HVAC testing, cleanroom testing, and biological safety applications with expanded probe compatibility and duct traverse methodology support.
- TSI Link for Respiratory Protection
Quantifiable outcome
- TSI Link for Respiratory Protection won the 2026 Occupational Health & Safety Industrial Hygiene Award in the Respiratory Protection: Fit Testing category, demonstrating measurable industry recognition for compliance and efficiency outcomes.
Companies that use TSI Incorporated
Customer profileSegments11 records
Ideal customer profiles5 records
TSI Incorporated technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
TSI Incorporated partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- University of MinnesotaminorTSI partners with the University of Minnesota for its internationally recognized Aerosol & Particle Measurement Short Course, offered annually. The course provides professional education in aerosol science and particle measurement, reflecting TSI's commitment to advancing aerosol education.
Scale indicators3 records
Recent moves6 records
Expansion highlights6 records
TSI Incorporated competitors and assessment
Company assessmentEmerging players
- Aeroqual: Specialized air quality monitoring company focused on real-time gas and particulate sensors for environmental and IAQ applications, overlapping TSI's DustTrak and IAQ meter categories with a more software-centric approach.
Direct peers
- SICK AG: Industrial sensor and measurement manufacturer with overlapping flow, gas, and particle measurement capabilities for HVAC, cleanroom, and industrial process monitoring.
- Sensirion: Manufacturer of high-precision gas flow, humidity, and particulate sensors used in HVAC, medical, and industrial applications — overlapping with TSI's flow meters, IAQ probes, and sensor modules.
- Dräger: German safety and measurement specialist with overlapping respiratory protection (fit testing), gas detection, and occupational health product lines serving industrial hygiene and emergency response markets.
- Particle Measuring Systems (Spectris): Direct competitor in cleanroom and pharmaceutical particle counters (Apex, Lasair III, BioTrak-class products) and a closely overlapping target customer base in semiconductor and life sciences manufacturing.
- Lighthouse Worldwide Solutions: Direct competitor in cleanroom particle counters and contamination monitoring for semiconductor and pharmaceutical customers, with overlapping ISO 14644 / GMP Annex 1 use cases.
Broad incumbents
- 3M: Major player in respiratory protection and occupational health products with overlapping customer base in industrial hygiene, where TSI's PortaCount fit testers are used to validate 3M respirators.
- Thermo Fisher Scientific: Global scientific instruments leader with overlapping analytical instruments, particle characterization, and environmental monitoring product lines serving pharma, life sciences, and industrial customers — making it the broadest incumbent comparable to TSI's measurement portfolio.
- Endress+Hauser: Global leader in industrial process measurement instrumentation (flow, level, pressure, analytical), with overlapping flow and analytical product lines serving industrial hygiene and process customers.
- Honeywell International: Diversified industrial conglomerate with sensing and IoT, building IAQ, and worker safety product lines (including respiratory protection through its PPE business) that overlap TSI's HVAC, IAQ, and occupational health verticals.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
TSI Incorporated social profiles
Digital presenceTSI Incorporated financial estimates
Financial estimateRevenue estimate
Valuation estimate
TSI Incorporated leadership team
Management profileNumber of profiles
Profiles2 records
TSI Incorporated subsidiaries and ownership
Company hierarchySubsidiaries6 records
TSI Incorporated funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
TSI Incorporated M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about TSI Incorporated
What does TSI Incorporated do?
TSI Incorporated designs, manufactures, and services precision measurement instruments, software platforms, and calibration/repair services for laboratory and field applications. Its portfolio spans particle counters, aerosol and dust monitors, ventilation test instruments, indoor air quality meters, flow meters, respirator fit testers, noise dosimeters, and cleanroom particle counters, complemented by the TSI Link cloud software ecosystem and the OmniTrak wireless multi-parameter monitoring platform.
Is TSI Incorporated a public or private company?
TSI Incorporated is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was TSI Incorporated founded?
TSI Incorporated was founded in 1961. It employs 501 to 1,000 people.
Where is TSI Incorporated based?
TSI Incorporated is headquartered in Minnesota City, United States, in the North America region.
How does TSI Incorporated make money?
Three revenue lines are on record. Precision Measurement Instruments are the primary driver. The others are software and SaaS Subscriptions and service, Repair, and Calibration.
Who are TSI Incorporated's main competitors?
Aeroqual is listed as an emerging player. Direct peers are SICK AG, Sensirion, Dräger, Particle Measuring Systems (Spectris) and Lighthouse Worldwide Solutions. Broad incumbents are 3M, Thermo Fisher Scientific, Endress+Hauser and Honeywell International.
Does TSI Incorporated have an API?
No public API is recorded for TSI Incorporated.
What industry is TSI Incorporated in?
TSI Incorporated's product category is Precision Measurement Instruments. Its primary akta.pro industry code is IMAGAFAH, Calibration Services & Standards (Calibration labs, reference standards, traceability services), with a secondary code of HSAOAIAD, Indoor Air Quality (IAQ) Testing & Monitoring. Its NAICS code is 334513 and its SIC code is 3823.