Aerosol Measurement

The Dekati® High Resolution ELPI®+ (Electrical Low Pressure Impactor, HR-ELPI®+) is an improved version of the widely used ELPI®+ instrument. Since 2024, the HR-ELPI®+ is offered as the standard ELPI®+ version.

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The High Resolution ELPI®+ utilizes a data inversion algorithm that gives real-time particle size distribution in up to 500 size classes 6 nm – 10 μm. Other High Resolution ELPI®+ features include wide particle sample concentration range, robust structure and possibility to characterize chemical composition of size classified particles after the real-time measurement. The latest addition to the HR-ELPI®+ features is a new Data Analysis Tool software that makes data analysis and visualization fast and easy for the instrument operator. This new tool comes with particle number, LDSA and mass concentration (6nm-2.5 μm) calculations for the HR-ELPI®+.

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Benefits of the ELPI®+ system include:

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• Real-time stand-alone operation

• Wide sample concentration range 

• Wide particle size range

• The ability for post-measurement chemical analysis of size classified particles  

• Real-time particle charge distribution and gravimetric measurements

The Dekati® High Temperature ELPI®+ is a version of the ELPI®+ that allows for the direct measurement of heated aerosol samples up to 180° C.  The high temperature measurement avoids changes to the sample that can occur during cooling and dilution.

The Dekati®e-Filter™ adds real-time PM detection into a standard, US EPA 40 CFR Part 1065/1060 filter holder.  The e-Filter™ fits into all existing PM filter sampling systems, including CVS and partial flow tunnels.  This compact unit is battery operated and includes a diffusion charger with electrical detection for real-time measurement.  All data is saved to a micro-SD memory card.

The new Dekati® MPEC+™ (Mobile Particle Emission Counter) is a compact and portable instrument for easy onboard PN-PEMS measurements. At the core of the MPEC+™ is the patented Dekati® ePNC™ particle counting technology, which has been further optimized for fast transient emission measurements.

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The MPEC+™ is the device of choice for highly accurate PN-PEMS testing in accordance with RDE requirements. The Dekati® MPEC+™ has been thoroughly tested and verified in some of the harshest driving and climate conditions to make sure it always delivers superb measurement performance.

The DLPI+ (Dekati®Low Pressure Impactor) classifies particles into 14 size fractions, from 10 microns down to 16nm.  A chemical analysis of the size classified particles can also be performed. The DLPI+ impactor can be used in various particle measurement applications and can be heated up to 180°C with the DLPI+ Temperature Kit.  The kit includes a heating jacket for the impactor and integrated temperature control unit. 

The DLPI is a 13-stage cascade impactor used for the measurement of gravimetric particle size distribution. It has the ability to classify particle size from 10 µm down to 30 nm, with an optional filter stage accessory enabling the collection of particles below 30 nm. Currently, the DLPI is only available with a sample flow rate of 30 lpm.

A three stage cascade impactor for determining particle gravimetric mass size distribution.

The PM10 impactor provides information on the PM10, PM2.5 and PM1 mass size fractions. The PM10 impactor is available in 10 lpm or 30 lpm versions and complete setups can be provided for different applications including airl quality monitoring and combustion flue gas measurements.

A cascade impactor with cutpoints of 2.5, 1.0, 0.5 and 0.2 microns and a back-up filter. 

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The particles are collected on Ø47 mm filters with sample flow rate of 70 lpm. DGI is typical used in combustion measurements including automotive emission testing, but it is can be applied to any measurements where particles in its operational range exist.

The Dekati® HT-DLPI+ is a version of the DLPI+ that can be heated up to 180°C.  The instrument allows for the direct measurement of heated aerosol samples without the risk of condensation or sample transformations. 

The Pegasor PPS-G2 is the next-generation particle sensor offering real-time monitoring of particle concentration and size. The sensor was first developed for vehicle emission testing, and today it is available for all industrial measuring and monitoring applications where reliability, accuracy and ease of use are required. The PPS-G2 is specifically designed for OEM applications and it comes with a range of data communication and other integration features that can be modified according to customer specific needs. With thousands of PPS-G2 sensors deployed in the market already, we can assure the availability of the sensor is even in large quantities.

Pegasor Particle Counter PPC is a complete, stand-alone measurement system for particle emission monitoring applications. Powered by the Pegasor PPS-G2 particle sensor, the PPC is an easy-to-install system for fast and reliable testing of particle emissions from engine/vehicle tailpipe or other emission source. The system fulfills all requirements and recommendations set in the new European regulations for measuring particle number concentration from vehicle exhaust in PTI applications but it is equally suited for any other exhaust or emission monitoring application.

Pegasor Airam is a standalone ultrafine particle monitor ambient, outdoor air quality measurements. The Airam system is powered by the Pegasor PPS-G2 sensor that provides real-time and accurate information on particle number (PN), lung deposited surface area (LDSA), particle mass (PM) and particle size. The Airam goes beyond traditional PM10 and PM2.5 measurements, aligning with the new European Union Ambient Air Quality Directive, setting stricter limits on key air pollutants, including ultrafine particles (UFPs). The new directive aligns more closely with the World Health Organization’s (WHO) air quality guidelines, aiming to reduce pollutants which are known to cause respiratory and cardiovascular issues.

The Topas LAP 323 uses two laser diodes with different wavelengths to enhance high resolution particle measurements in the size range of 0.15-40µm.  It features up to 128 size channels and can handle particle concentrations up to 10,000/cm³. 

The GMS 141 Gravimetric Measurement System is a heated filter collection system designed to measure oil content in crankcase blow-by aerosols.  A by-pass line allows separators to be brought up to operating conditions prior to filter collection, and a pressure drop measurement across the filter allows consistent mass loading for uniform results.

The PAP 610 Process Aerosol Photometer measures the particle mass of high concentration, crankcase blow-by aerosols in real-time.

The PAP 612 Process Aerosol Photometer measures the particle mass of low concentration, crankcase blow-by aerosols in real-time.

The PAM 510 Process Aerosol Monitor is an accessory to Topas’ Condensation Aerosol Generator SLG 270, and is used for the continuous monitoring of particle size and concentration of monodisperse aerosols.

The Topas FMS 374 is a simple setup that enables the user to achieve filter media efficiency results quickly, with a special focus on the current need for face mask media product development and production control.  Note there is a short manufacturing lead-time on this product, allowing for quick delivery.

The EarthSense Zephyr® is a small form, indicative air quality monitor designed to measure ambient air pollution at localized levels at very high time-resolved resolutions up to 10 seconds. It combines particulate matter PM10/2.5/1 measurement along with gases NO, NO2, O3, CO, SO2, H2S, CO2 and TVOC. The Zephyr® can be deployed as a single unit, or as a network of units utilizing GSM cellular network, Wi-Fi or Bluetooth communication and is paired with EarthSense's MyAir® and MappAir® for visualization and analysis.

The Aerosol Particle Mass Analyzer (APM 3602) classifies particles by mass, based on the balance between centrifugal force and electrostatic force.  This desktop unit classifies aerosol particles of 0.001 ~ 565 femtograms (Equivalent to approx. 12 ~ 1,008 nm for particle density of 1 g/cm3). 

The APM can be used in the following applications:

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• Mass distribution measurements

• Particle density research

• Monodisperse aerosol generation