At TSI, we manufacture a full line of individual aerosol generators and dispersers capable of producing monodisperse or polydisperse aerosols depending on your application.
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.
Aerosol neutralizers are an essential piece of many aerosol research studies because aerosol particles dispersed by nebulization, combustion, or powder dispersion are usually electrostatically charged.
TSI Ventilator Test Systems measure flow, pressure, and multiple parameters of ventilator performance with high accuracy.
Leading the way in laser-induced breakdown spectroscopy (LIBS) for the lab and field.
For half a century, TSI has earned the reputation as a leader in designing and manufacturing flow measurement instrumentation. TSI mass flowmeters and mass flow sensors for gases are used worldwide in laboratory and manufacturing settings, plus embedded applications.
TSI serves fluid mechanics and particle diagnostics researchers with state of the art transducers, controls, software and complete measurement systems. Our instruments provide flow and particle information in a wide range of applications including aerodynamics, spray diagnostics, hydrodynamics, and more.
TSI’s Fume Hood Monitors and Controllers help you comply with the requirements and recommendations set forth in ANSI, ASHRAE, NFPA, and OSHA, which specify best practices fume hood performance and laboratory design.
TSI provides room pressure monitors and controllers for a variety of critical environment applications including hospital isolation rooms, laboratories, and cleanrooms.
Work environments, as well as homes and businesses, often require that people spend a majority of their time indoors. As a result, individual’s long term health and comfort is largely dependent upon indoor air quality testing. Businesses are increasingly interested
A revolution in light metals analysis, sorting, and recycling.
Full line of high-performance Raman spectrometers including handheld, portable, bench top and installed process control instruments.
Select from a broad range of particle counters, including those specifically designed for research, controlled environments and occupational/indoor air quality applications.
TSI's family of particle sizers is able to measure particles that span a broad size range, making them suitable for a wide range of applications.
PolyMax™ Plastics Analyzer changes the game in plastics identification, using laser-based technology to validate the chemistry of both light and dark plastic compounds — based on science, not best guesses.
From quantitative fit testing equipment to mask integrity testing equipment, TSI has respirator fit testing solutions to comply with regulated standards and help ensure your respiratory safety.
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.
Airflow™ Instruments are accurate, high quality, professional-grade instruments used by a wide range of customers, including building service contractors, commissioning specialists, facility engineers and research professionals.
TSI manufactures high-quality Alnor® air velocity equipment. The Alnor brand of handheld instruments is widely used by HVAC contractors, facility personnel, building engineers, safety officers and industrial hygienists worldwide.
A family of chemical analysis solutions from TSI including LIBS and Raman Spectrometers.
TSI offers state-of-the-art instrumentation for a variety of aerosol research applications.
In addition to requiring minimal maintenance and low cost of ownership, TSI’s air quality monitoring instrumentation is reliable, easy to use in the field for both long term and short term deployments, and features research level accuracy.
Laser Induced Breakdown Spectrometers (LIBS) and Raman Spectrometers for advanaced chemical and molecular analysis in the lab and field.
TSI provides a number of solutions for cleanroom applications, helping customers ensure regulatory compliance, enhance safety of products, and improve quality.
TSI has automated filter testers (AFTs) and components systems that are used to comply with various testing standards and regulations around the globe.
TSI's measurement solutions and knowledgeable staff can open up new understanding in your area of fluid mechanics and experimental research. Our products offer solutions in the areas of hydrodynamics, aerodynamics, spray diagnostics and more.
From biomedical testing to critical-space room pressure control, TSI provides a number of solutions specifically designed for hospital settings to enhance safety and efficiency.
TSI offers a full range of HVAC testing instruments that positively impact building occupant quality of life as well as improve energy efficiency of HVAC components.
Great for new and retrofit projects, TSI offers laboratory controls to match the requirements of a wide variety of applications.
Superior solutions for light metals analysis based on state-of-the-art laser technology.
TSI’s unique, real-time nanoparticle measurement instruments are relied upon by many professionals, including nanoparticle material and process researchers, inhalation toxicologists, industrial hygienists, and process engineers.
TSI occupational hygiene instruments help with the selection and implementation of effective workplace engineering controls, as well as the selection, use, and limitations of personal protective equipment.
Confident plastics analysis and identification solution for use throughout the plastics recycling life cycle.
Organizations worldwide rely on TSI CBRN defense products for reliable protection of personnel from chemical, biological, radiological or nuclear (CBRN) threats.
1928, Sir C.V. Raman and his colleague K.S. Krishnan made their discovery of
what came to be called Raman scattering while searching for an optical analog
to the Compton Effect. It was nearly
simultaneously discovered by G.S. Landsberg and L.I. Mandelstam, two Russian
physicists, during the course of their studies on specific heats of solids. Raman and Krishnan observed the inelastic scattering of light first by focusing filtered sunlight, and later by focusing a quartz mercury arc lamp through a photographic filter to remove all lines of greater wavelength than 4356 Å, and directing it into samples of common solvents. The resultant spectra were collected on photographic plates, and showed modified lines that indicated a change of wavelength in the outgoing light. The first Raman spectra acquired of benzene are presented in Figure1. Because the efficiency of Raman scattering is so low, extremely long acquisition times were needed in this early work (2-100 hours for liquids and more than 180 hours for vapors have been reported). In total, Raman and Krishnan observed scattered secondary radiation in 60 liquids and vapors.
Due to the inefficient nature of the scattering, several technological advances were necessary before Raman spectroscopy became a common laboratory technique. As discussed in the previous section, only 1 in 106 to 108 incident photons are returned shifted by the interaction with the molecules. The development of the laser, then, permitted much more effective measurements because of the dramatic increase in the amount of incident light. Improvements in monochromator systems, both to resolve the Raman spectrum and limit the amount of Rayleigh scattering present in spectral data, also encouraged use of Raman spectroscopy to study molecular structure and chemical systems. Miniaturized Raman systems in current use, including those in the TSI | ChemLogix product line, became possible with the advent of frequency-stabilized solid state lasers and small monolithic spectrometers.
Further, narrow notch filters are also available for the removal of the excitation light in the spectra and sophisticated software solutions exist for background elimination and in support of end-user purposes.