TSI Incorporated has earned the reputation as a leader in designing and manufacturing flow measurement instrumentation. TSI mass flow meters, Certifier flow analyzers, and mass flow sensors for gases are used worldwide in laboratory and manufacturing settings, plus embedded applications.
About TSI Incorporated
Our flow meters, flow analyzers, and embedded flow sensors are optimized for medical applications where accuracy and reliability are key requirements. Accurate and Reliable Flow Meters, Flow Analyzers, and Flow Sensors, all TSI flow meters, Certifier™ flow analyzers, and flow sensors boast the following performance advantages:
- Fast response time: Four millisecond (ms) response times are ideal for control applications and measuring tidal volumes with high accuracy.
- Fully calibrated: All TSI flow meters, flow analyzers, and flow sensors are characterized against a flow reference and have extensive gas calibrations stored on-board. The result is highly accurate measurements.
- Fully compensated: All TSI flow meters, flow analyzers, and flow sensors are temperature-compensated and provide an output of mass flow independent of temperature and pressure.
TSI Digital Flowmeters Trusted Worldwide in a Variety of Applications
Researchers, engineers, designers, and scientists use TSI digital flow meters in applications such as:
- Engineering new product development
- Research
- Manufacturing and quality assurance
- Field service
TSI Incorporated Products

Flow Meter, Sensors, and Flow Analyzers
They’re designed to measure air, oxygen, and other gases for embedded applications. The compact size and standard configurations make it easy to design them into your products.
TSI embedded mass flow sensors are optimized for medical applications with respiratory products being an ideal fit for TSI technology. Since 1983, TSI flow sensors have been used in patient ventilators around the world due to the unique TSI technology and performance. TSI flow sensors are trusted as reliable, accurate, and cost effective for use in ventilator applications ranging from adult to neonatal.
Certifier Flow Analyzers
TSI has earned the reputation as a leader in designing and manufacturing flow measurement instrumentation. TSI mass flow meters, Certifier flow analyzers, and mass flow sensors for gases are used worldwide in laboratory and manufacturing settings, plus embedded applications. Our flow meters, flow analyzers, and embedded flow sensors are optimized for medical applications where accuracy and reliability are key requirements.
Accurate and Reliable Flow Meters, Flow Analyzers, and Flow Sensors
All TSI flow meters, Certifier™ flow analyzers, and flow sensors boast the following performance advantages:
- Fast response time: Four millisecond (ms) response times are ideal for control applications and measuring tidal volumes with high accuracy.
- Fully calibrated: All TSI flow meters, flow analyzers, and flow sensors are characterized against a flow reference and have extensive gas calibrations stored on-board. The result is highly accurate measurements.
- Fully compensated: All TSI flow meters, flow analyzers, and flow sensors are temperature-compensated and provide an output of mass flow independent of temperature and pressure.
TSI Digital Flowmeters Trusted Worldwide in a Variety of Applications
Researchers, engineers, designers, and scientists use TSI digital flow meters in applications such as:
- Engineering new product development
- Research
- Manufacturing and quality assurance
- Field service
Aerosol and Dust Monitors
Aerosol monitors, commonly referred to as dust monitors, particulate monitors, light scattering laser photometers, and nephlometers, are used to measure dust, smoke, mist, fume, condensates, and fog. TSI Aerosol Monitors offer real-time, direct-reading results, which is quickly becoming an industry best practice in occupational hygiene, indoor air quality, and outdoor environmental fugitive emissions monitoring.
Direct-Reading Aerosol Monitoring and Analysis
TSI Aerosol Monitors enable real-time, direct-reading aerosol monitoring and analysis in a variety of indoor and outdoor applications including:
- Dust monitoring
- Ambient monitoring
- Work area monitoring
- Personal exposure monitoring
- Outdoor environmental fugitive emissions monitoring
- HVAC and LEV monitoring
- Indoor air quality monitoring
Solutions for Area Monitoring and Breathing Zone Analysis
- TSI DustTrak™ DRX Aerosol Monitors simultaneously measure both mass and size fraction, and offer aerosol monitoring and analysis – all in one instrument.
- TSI SidePak™ AM520 Personal Aerosol Monitor—the industry’s smallest, most portable personal dust monitor on the market—is a rugged belt-mounted laser photometer used to reduce worker exposures and increase confidence of compliance before gravimetric testing.
- TSI SidePak™ AM520i Personal Aerosol Monitor is IECEx and ATEX certified, meaning it can help you achieve continuous compliance in a variety of volatile environments.
From handheld to desktop to personal aerosol monitors, no other manufacturer has the capability to perform real-time, direct-reading aerosol monitoring and analysis in any environment or application.
Aerosol Generators & Dispersers
Aerosol generators and dispersers play a vital role in producing the defined aerosol required for an array of aerosol testing, production, and research. Applications requiring aerosol generation are very diverse, and include, but are certainly not limited to, filter testing, deposition of nanoparticles onto surfaces, vacuum-cleaner performance tests, and calibration of aerosol instruments.
At TSI, we manufacture a full line of individual aerosol generators and dispersers capable of:
- Size: <10 nm – 200 µm
- Concentration: as high as 107 particles/cm3
- Composition: solid (dissolved or suspended), liquid or powdered
- Size distribution characteristics: monodisperse or polydisperse
Cleanroom Particle Counters
TSI’s cleanroom facility environmental monitoring products with built-in redundancy provide the confidence you need to reliably monitor critical processes and demonstrate compliance. Eliminate waste, interventions and interruptions using TSI:
- Facility Monitoring Software (OPC UA Client/Server)
- Remote Active Air Sampler
- Remote Particle Counters (including new AeroTrak®+ Remote Particle Counters)
- Real-Time Viable Particle Counter
- Handheld Particle Counters
- Portable Particle Counters
- Condensation Particle Counter
to learn more about TSI’s complete and robust environmental monitoring system—designed to ALCOA+ principles and automating many data integrity touchpoints.
Indoor Air Quality Meters / Instruments
Work environments, as well as homes and businesses, usually require that people spend a majority of their time indoors. As a result, an individual’s long-term health and comfort can depend on indoor air quality testing. Businesses are increasingly interested in air quality monitoring systems to keep an eye on the conditions that maximize worker productivity and save energy. To meet these needs, TSI manufactures a line of effective indoor air quality (IAQ) instruments known for their easy use, consistency and reliability.
Accurate and Dependable Air Monitoring Instruments from TSI
TSI provides a full line of indoor air quality monitoring equipment that gauge temperature, humidity (percent RH, wet-bulb, dew point), outdoor air calculations, carbon dioxide, carbon monoxide and airborne particles. These factors are some of the primary components that help measure occupant thermal comfort and assure a healthy indoor environment.
Our equipment is known for uncompromising accuracy and reliability. We have designed our instruments for easy operation with a full range of advanced capabilities, such as data logging and statistical analysis. Our systems have positive impacts in the countless fields where air quality is a concern.
Contact TSI to learn more about indoor air quality monitors, HVAC testing equipment and other indoor air quality equipment. We can help you maintain a safe, healthy and energy efficient workplace.
Noise Dosimeters and Sound Level Meters
TSI’s Quest™ Edge Personal Noise Dosimeters are shoulder mounted, providing ergonomic, convenient measurement. Handheld Quest sound level meters measure average sound pressure level over time. All units are compact, with large displays and intuitive interfaces to provide crucial information at a glance and in real-time.
Our personal noise indicators and sound detectors make it easier to measure sound and noise levels in real-time, and determine the level of hearing protection necessary in a particular environment.
The Detection Management Software program works with various TSI Quest data logging instruments, allowing you to record, report, chart and analyze exposures to a host of occupational and environmental hazards.
Our noise dosimeters and sound level meters are ideal for the following applications:
- Mining
- Commercial construction (demolition and equipment)
- Road Construction
- Military
- Industrial Manufacturing: such as metal fabrication, open air automated production lines, maintenance areas
- Oil and Gas and downstream refineries – ATEX and IECEx approval
- Urban areas
With TSI, you can continue to expect the highest quality performance from our instruments, and high class service.
Particle Counters and Detectors
In environmental research and monitoring, customers face high concentrations in city centers, near freeways or harbors, or very low concentrations in remote locations which are used as reference sampling points.In the laboratory, particle counters are often combined with particle sizers to measure size distributions.
Workplaces, hospitals, schools, residential homes and other sensitive environments prefer water-based Condensation Particle Counters (CPCs) to ensure the occupants’ safety and health. Combustion aerosol has its own challenges, such as sampling the aerosol without changing it, or following regulatory directives for engine exhaust.
Particle Sizers
TSI provides aerosol sizing instruments that expand our understanding of aerosols and lead to breakthroughs in research and a wide range of industries. TSI manufactures particle sizing instrumentation and systems that span the particle size range from 1 nm to 20 micrometers. Our instruments are routinely used around the globe in a variety of applications, including air quality monitoring, aerosol research, engine emissions, exposure studies, and many more.
TSI’s particle sizers provide particle size ranges for a variety of applications, click below to discover how TSI can support your research and measurement needs.
Respirator Fit Testers
Fire service and law enforcement employees, as well as industrial companies and healthcare professionals have come to depend on properly fitting respirators for protection from respiratory hazards, such as chemical and environmental hazards, as well as airborne biohazards.
When implemented correctly, a respirator fit test program can help ensure that the highest respiratory protection levels are achieved through a properly sized and donned respirator.
Easy, Accurate, and Repeatable
PortaCount® Respirator Fit Testing equipment measures real-time fit while the user simultaneously performs a series of moving, breathing and talking exercises designed to simulate the same movements made in the field. With step-by-step guidance, the instrument walks you through the fit test.
Once the fit test is complete, it is easy to generate reports. The test results load into a database for retrieval and regulatory compliance.
Total Mask Testing Solutions
From quantitative fit testing equipment to mask integrity testing equipment, TSI helps you comply with regulated standards to ensure your workers’ respiratory safety.
Passing a real-time quantitative respirator fit test proves that the face piece is sized and donned correctly, as well as provides for valuable opportunity for training. The PortaCount® Respirator Fit Tester can test all types of respirators, including N95 filtering face piece respirators.
Testing mask integrity helps identify leaks and ensure the proper functioning of a face piece. The Mask Integrity Test Accessory (MITA), in tandem with the PortaCount® Respirator Fit Tester, tests full-face respirators and chemical, biological, radiological and nuclear defense (CBRN) gas masks.
Ventilation Test Instruments
TSI’s full line of industrial ventilation test instruments are designed to accurately and reliably measure a wide variety of parameters important in monitoring and maintaining indoor environments. TSI Incorporated instruments are optimized for ease-of-use, yet offer a range of advanced capabilities including data logging, that are critical in ensuring quality commercial ventilation.
Source: TSI Incorporated
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