TSI Incorporated

The TSI Engine Exhaust Particle Measurement System (EEPMS) 3095 is a specialized spectrometer designed for the real-time measurement of particle size distributions from vehicle and engine exhaust. The system is built upon the Fast Mobility Particle Sizer (FMPS) technology, enabling it to measure the entire particle size spectrum simultaneously with a one-second time resolution. This makes it ideal for capturing transient events, such as changes during engine start-up or acceleration. The EEPMS 3095 can measure solid and non-volatile particles in the size range of 5.6 to 560 nanometers. Its primary applications are in engine research and development, after-treatment (e.g., diesel particulate filter) testing, and regulatory compliance checks.

The TSI Fast Mobility Particle Sizer (FMPS) Spectrometer, model 3091, is an instrument designed for real-time measurement of nanoparticle size distributions. Unlike the Scanning Mobility Particle Sizer (SMPS) which scans through voltages sequentially, the FMPS uses a different electrical mobility measurement technique with multiple electrometers to measure the entire particle size spectrum simultaneously. This allows for a much faster measurement time, providing a full size distribution in as little as one second. The instrument measures particles in the size range from 5.6 to 560 nanometers. It is particularly useful for applications where particle concentrations and size distributions change rapidly, such as engine exhaust measurements, atmospheric process studies, and monitoring of nanoparticle synthesis.

The TSI Scanning Mobility Particle Sizer (SMPS) Spectrometer, model 3938, is a high-resolution instrument designed to measure the size distribution of airborne submicrometer and nanoparticles. The system works by size-selecting particles based on their electrical mobility using a Differential Mobility Analyzer (DMA) and then counting the size-selected particles with a Condensation Particle Counter (CPC). By scanning through a range of voltages, it generates a full particle size distribution. The SMPS 3938 series can measure particles in the range from 2.5 nanometers to 1000 nanometers (1 µm), making it a standard tool for nanoparticle characterization in various fields, including atmospheric research, air quality monitoring, nanotechnology research, and combustion studies.