TSI—When You Demand Unmatched Speed and Accuracy in Engine Exhaust Characterization

Condensation Particle Counters (CPCs)

With more than 30 years of experience, TSI is the world’s foremost manufacturer of CPCs. CPCs accurately measure particle number (PN) concentration of exhaust emissions. In fact, the GRPE Particle Measurement Programme (PMP) has recently completed the light-duty, inter-laboratory correlation exercise (LD ILCE) and concluded that particle number measurements using a CPC+thermodilution are 20 times more sensitive and much less variable than the mass method (i.e. the gravimetric filter analysis method). As a result, the PMP is recommending that solid PN measurements be considered for EURO 5 regulations.

Our newest CPC, the Model 3790 Engine Exhaust Condensation Particle Counter (EECPC), is fully compliant with the draft PMP specifications and features include highly repeatable measurements, anti-spill/anti-flooding design, condensate removal system, removable saturator for ease of maintenance, USB communication interface, and more.

Rotating Disk Thermodiluters and Thermal Conditioners

Proper dilution and conditioning of exhaust emissions is essential to obtain accurate size distribution and particle number measurements. TSI Rotating Disk Thermodiluters are highly regarded in the field of particle emission measurement, especially for sampling, diluting and conditioning exhaust from diesel and spark-ignition engines. Our thermodiluters feature accurate dilution over two full decades, an adjustable dilution ratio without need for special tools or re-calibration, and a built-in heater with selectable temperatures to avoid measurement of condensed volatile materials. And, they are compatible with a wide variety of TSI particle sizers and counters, including SMPS systems, EEPS spectrometer, CPCs, and the EAD.

Combine the Model 379020 Rotating Disk Thermodiluter with a Model 379030 Thermal Conditioner Air Supply and a Model 3790 EECPC for solid particle number (PN) concentration measurements that are fully compliant with the draft PMP specifications.

Scanning Mobility Particle Sizer™ (SMPS™) Spectrometers

The recognized standard for sizing ultrafine particle emissions is a TSI SMPS system. TSI SMPS spectrometers feature unmatched particle size accuracy, resolution and speed. They can measure a complete size distribution in as little time as 30 seconds. With a choice of differential mobility analyzers (DMAs) and condensation particle counters (CPCs), TSI’s Series 3936 SMPS are versatile and can be configured to your particular application requirements. Only TSI’s SMPS systems have proven to work well at low particle concentrations downstream of a diesel particulate filter.

Engine Exhaust Particle Sizer™ (EEPS™) Spectrometers

The EEPS spectrometer is the latest instrument for real-time sizing of particle emissions. It measures 10 complete size distributions every second, covering the range from 5.6 to 560 nm with 32 size channels of resolution. By offering the highest time resolution of any instrument (10 measurements/sec), the EEPS spectrometer is ideal for evaluating particle emissions during transient engine operation and characterizing efficiency and developing regeneration strategies for exhaust after-treatment systems. The EEPS spectrometer is fully integrated; easy-to-use and well suited for both low and high particle concentrations. It features 4 configurable analog outputs that can be weighted for number, surface area, volume or mass distributions that enables easy integration with other engine test equipment.

Electrical Aerosol Detector (EAD)

The EAD is the perfect tool for measuring particle emissions second-by-second. It is simple to operate, robust, offers highly repeatable measurements, and is capable to operate over a wide concentration range. When combined with a TSI Rotating Disk Thermodiluter, the EAD becomes a real-time solid PM detector. Such features make the EAD ideally suited to evaluate particle emissions during transient engine operation, characterize efficiency of exhaust after-treatment systems and for on-board emission measurements.

DustTrak™ Aerosol Monitor

The DustTrak aerosol monitor is a portable, battery-powered laser photometer that measures PM emissions in real-time. It has been used extensively in roadside field studies and for on-board emission measurements to track and record changes in PM. The DustTrak aerosol monitor measures airborne PM from 0.001 to 100mg/m³ and features an analog output and internal data logging capability to facilitate data collection and storage.