The list below is a selection of news from our partners and other news of general interest in the fields we re are active in. You can receive more information by clicking on the links provided below (wherever applicable) or by contacting us directly, using the contact information above. In many cases, you can also find more detailed information at the web sites of our partners.


Contact us for more information at: +46 (0)8 647 45 99, or: info(at)

Besides the news below, ExIS also publish newsletters. To subscribe to our newsletters, just send an e-mail with ”subscribe” in the title to this e-mail address: info(at) Newsletters are also available for downloading. Click here to get access to our  latest newsletters.

ELPI®+ maintenance instruction videos

Dekati is constantly trying to improve customer service and make operation of Dekati® instruments easier for their customers. The latest additions to the customer support material provided are instructional videos on how to use and service the ELPI®+ instruments. The videos are now available at YouTube and at the customer pages section of Dekati’s website. We are sure these videos will be helpful!

YouTube videos   



Dekati’s eFilter™ has been launched

Dekati is proud to announce a new product for standard gravimetric and real-time detection of PM. The new Dekati® eFilter™ is a gravimetric filter holder with an integrated real-time particle concentration measurement. The Dekati® eFilter™ assembly is approximately the same size as a normal PM filter holder and it fits directly into all existing PM filter sampling systems including CVS tunnels. In addition to the standard gravimetric filter measurement, the Dekati® eFilter™ gives a real-time signal throughout the filter sampling period which allows monitoring PM accumulation on the filter during different stages of the filter sampling. This real-time signal changes the standard filter holder into a sensitive, dynamic measurement instrument for modern routine emission measurements.

eFilter brochure   



Last update: 2017-11-22

Meet us and our partners at Testing Expo in Stuttgart, June 4-6

At Testing Expo, the following of our partners will exhibit:

· Control Sistem

· Matter Aerosol

· Topas


Control Sistem will show updates on the mini and micro dilution systems PSS-20 and Micro-PSS. The PEMS version of the latter one might be of special interest. New information about the altitude simulation test rig, EACS, will also be available.


Matter Aerosol will launch the NanoMet 3 nanoparticle counter for on-board PEMS measurements. Particles in the range between 10 and 700 nm can be measured. More info.


Topas will exhibit their new test rig for measuring blow-by gases from combustion engines.


Please contact us for more information



Documentation from the ETH Nanoparticle Conference

For your convenience, we have selected a couple of presentations and posters from the 16th ETH-conference on Combustion Generated Nanoparticles in Zurich that cover instruments and equipment from our partners Control Sistem, Dekati, Matter Aerosol and Pegasor.

Presentations and posters (in alphabetical order of the main author/presenter) and instrumentation:

· Beck (MAN): “Correlation between Pegasor Particle Sensor and Particle Number Counter Application of Pegasor Particle Sensor in Heavy Duty Exhaust.” Pegasor PPS-M sensor.

· Besch (WVU): “Real-World Particulate Emissions from a 2010 Compliant HD Diesel Truck Travelling Across the Continental United States.” Pegasor PPS-M sensor. 

· Hagen (Missouri Uni.): “Observed Correlation Between Mean Size and Number- and Mass- Concentrations for Jet Engine Soot.” Dekati ejector diluter.

· Karjalainen (Tampere Uni.): “Particle Emission Reduction in a SI-DI Vehicle by an Open Channel Filter.” Dekati ejector diluters and Electrical Low Pressure Impactor (ELPI).

· Køcks (DTI): ”Shipboard characterization of a wet scrubber system: Influence on particle number concentration, particle size distribution and chemical composition.” Matter Aerosol’s Rotating Disk Diluter and Dekati’s ELPI.

· Lappi (VTT): ”Origin of particle emissions of a new IMO NOx Tier 2 category cruising ship compliant with European SOx emission control areas.” Dekati’s ELPI.

· Lauer (MAN): “On the experience of first DPF operation at a medium speed 4-stroke Diesel engine on board a commercial ocean going vessel.” Control Sistem’s Micro PSS.

· Richard (Fachhochschule Nordwestschweiz): Mobile measurements of number concentrations of ultrafine particles in different Swiss cities with the miniDiSC.” Matter Aerosol’s DiSCmini.

· Ulrich (EMPA): “Particle and metal emissions of diesel and gasoline engines - Are particle filters appropriate measures?” Matter Aerosol’s Rotating Disk Diluter and Dekati’s ELPI.

For more information: ETH Nanoparticle home page



Pegasor Mi2 brochure

The new Pegasor Mi2 for measuring particle mass and number incorporates the stand-alone Pegasor M™ sensor to an integrated measurement system. In Mi2, all necessary auxiliary components are integrated to secure proper operation of the sensor in all conditions. Read more about the new Mi2 in the brochure and the corresponding presentation.


Pegasor Mi2 brochure                      Mi2 presentation



Brochure of Grimm´s EDM 180 and 365 instrument in Swedish

For those of you who prefer Swedish, we have prepared a brochure of the popular Grimm EDM 180 and 365 in Swedish. For those of you who want more detailed information and/or prefer English, the more comprehensive English EDM catalogue is available.


EDM 180 & 365 broschyr                              Grimm EMD Catalogue   



Pegasor M sensor and Mi2 update

The various versions of the Pegasor instruments might be somewhat confusing, so a short overview is made here.

The first version of the Pegasor PPS-M sensor was intended for stand-alone measurements. In autumn 2012, the so-called integrated sensor, Mi2, was introduced. The objective was to integrate all necessary auxiliary components to secure ideal measurement conditions in all environments and conditions. Mi2 is available in two different versions, one for test cell use, the second one for on-board use. The main difference is that the version for mobile use has its own air supply unit (PPS-MP01 PPS-M) with compressors, cleaners and dryers, while the test cell version use workshop pressurized air with an optional filter & dryer unit (PPS-MA35). The power supply units are also different. With all the necessary options the same Mi2 unit can be used both in test cells and for on-board measurements. A graphical presentation of the versions can be found in the attached document (see link below). As a hint, note that items included in the standard shipment in each case have text and dot in green, while optional items have text and dots in red.

In summary, with all the necessary accessories, the same basic M sensor can be used in all three mentioned setups. Or else, the customer can have the choice of the configuration that fits the requirements best for his particular application.

In previous news, the improvements of the M sensor introduced in autumn 2012 and the new Mi2 unit has been described in more detail. In short, the M sensor has received a new internal heater that does not need a separate temperature regulator. Product safety has also been improved as the new heating element includes overheat protection.

Further development in the pipeline for the near future are: AK interface with Ethernet connection has been developed for Pegasor M sensor. AK interface replaces the normal PPS interface and can be ordered separately already now. AK interface for Mi2 is under development and first customer deliveries are expected in March 2013. For new Mi2 deliveries the AK protocol is included in the standard delivery.


Pegasor setups                                         Pegasor M sensor brochure (new)


Pegasor Mi2 brochure                      Mi2 presentation



NanoMet 3 from Matter Aerosol launched at Expo in Stuttgart, June 4-6

NanoMet3 is a new instrument for Portable Emission Measurement Systems (PEMS) application to measure number concentration and diameter of nanometer-sized particles in the size range 10-700nm on the road. It has a compact, portable and rugged design, and provides online response. Due to these properties, it is a useful instrument for particle number concentration measurements in non-laboratory settings and even OBD instrumentation.


To measure only the solid particle fraction, it is necessary to condition the sample thermally in order to eliminate the volatile fraction.NanoMet3 features a separate exhaust probe and control unit that effectively dilutes the sample at the source (tailpipe, CVS tunnel or stack) in order to preserve it for accurate measurement. The portable system is completed with Matter’s proprietary Diffusion Size Classifier technology, a new sensor for measuring the number concentration and average diameter of nanometer sized particles.


Please contact us for more information



New products from Ecomesure

Ecomesure has launched a couple of new products. The Mini Particle sampler, MPS, is a portable, simple and easy to use device for particles collection and analysis. MPS allows collecting the particles on the TEM (Transmission Electron Microscopy) grid with high collection efficiency for particles characterization. The objective of the MPS is not to collect a big amount of particle for mass measurement but just enough particles for TEM analysis. Particle analysis has become a real stake in lot of industrials processes but also in air quality measurement.


The Universal Sampling and Dilution system, USD, enables sampling and conditioning for all types of gas and aerosols in a large range of concentrations in process conditions (high temperature, corrosive gas, high humidity rate). USD is well adapted for emissions monitoring especially stack sampling. A new and innovative sampling probe geometry is used in order to make a heated dilution and conserve high sampling velocity and by consequence a high aerosol and gas sampling efficiency. The USD-1000/USD-2000 can be used in a large range of applications. One of the most interesting tasks is to connect all the types of analysers (mass spectrometers, gas analysers, particles analysers) at any type of sampling point in industrial process. The patented UDS system has been developed in a project funded by ADEME involving four partners; among them, Ecomesure.


Ecomesure has also developed an integrated measurement system for real-time and long-term smokestack measurements. This system is based on the Pegasor M-sensor technology. We will provide more information on this system shortly…


Mini Particle Sampler (MPS)          Universal Sampling Device (USD)



Very promising results in on-board particle number measurements at JRC

The first results from the EU on-board particle number measurement campaign (PEMS-PN) were reported to the participants for discussion in early February by EUs own laboratory, JRC. Separate discussions about results were held later with all instrument suppliers. In total, 5 instrument manufacturers are represented in the study. Two of our partners, Matter Aerosol and Pegasor participate with PEMS-PN instruments. The aim of the study is to assess and validate the application and performance of portable PN instrumentation relative to each other and to a standard instrument (conventional PMP measurement system). A great number of tests have been made on light-duty vehicles operated on a chassis dynamometer and on the road. Cars representing a conventional gasoline car (MPI), three different gasoline direct injection (GDI) cars and a diesel car with DPF were included. No car with a gasoline particle filter has (yet) been studied. There is still some data evaluation to be carried out and potential issues to be sorted out and we will, of course, come back with more comprehensive information when this is available. For the moment, we can make a very brief summary and we want to deliberately limit it to our partner’s instruments.


NanoMet3 from Matter Aerosol comprise a PMP type dilution system for measuring solid particles and a particle instrument using particle charging and electrical detection (based on the DiSCmini instrument) for particle sizes ranging from 10 to 700 nm. The results were very promising for all types of cars and test cycles and thus, NanoMet3 was chosen the reference system by JRC. A contributing reason for this choice could be that the dilution and volatile particle removal is identic to a PMP instrument. The other candidate instruments are based on other technologies.


Pegasor participated first with a Mi2 and later (December 2013) with the new Mi3 instrument. These instruments use heated sampling direct in the exhaust where the flow is driven by an ejector (small internal dilution) and particle measurement is carried out via charging and electrical detection. Two issues were first reported by JRC but both seem to have been sorted out now. The reasons were not attributed to the instrument itself bur rather related to errors in data post-processing or data acquisition. In summary, the results are very promising with Pegasor’s instrument regarding all the tests carried out.


NanoMet3 brochure                   Mi3 brochure



High temperature ELPI+™ launched

The High Temperature ELPI+™ was launched in 2013 and the first units were delivered. The impactor of the HT ELPI+™ can be heated up to 200°C thus avoiding condensation of volatiles. This is particularly advantageous if volatile concentrations are high but particle concentrations are low, making the use of thermodilution (heating+dilution) practically impossible. No other real-time instrument on the market can offer such an option! For existing ELPI+™ users there is a possibility for an upgrade. More information on the HT ELPI+™ will be provided later.



EACS update

The development of Control Sistem´s high altitude simulation test system, EACS, continues. EACS is available in sizes from automotive to marine engines. It can be used both on chassis dynamometer and engine test cells. Since the last update on this topic, several installations have been completed and additional units have been ordered. In Control Sistem´s own test cell in Pianezza, EACS testing can be commissioned and demonstrated. We can organize visits to Pianezza or to selected customer sites.


Please contact us for more information



Pegasor Mi3 launched

Pegasor has launched the new Mi3 as a turnkey solution for automotive PM and PN emissions monitoring. Compared with the previous Mi2, Mi3 provides numerous updates and improvements of both hardware and software. Data output and test cell integration is carried out through a variety of output connection options. Read more in the news release from Pegasor and the Mi3 brochure.


Pegasor Mi3 launched       Mi3 brochure   



BBT 143 engine blow-by test stand by Topas

Topas’ Blow-by Test rig BBT 143 is a compact measuring system for the determination of the oil droplet content of crankcase gases (blow-by) in engine test rigs. It combines the precision of a gravimetric measurement with the real-time capabilities of optical concentration measurements with aerosol photometers. BBT 143 is ideal for benchmarking of oil mist separators and provide a substantial reduction of the time needed for mapping of such devices.


Please contact us for more information


BBT 143 brochure



Several new instruments introduced by Grimm

Our partner Grimm has introduced 3 new instruments for measurement of air quality.

The new EDM 11-E instrument corresponds to the former EDM 107 and is intended as a hand-held instrument for ambient air quality measurements. The new 11-R corresponds to the old 1.109 instrument and is intended as a hand-held instrument for measurement of indoor air quality. Both Mini Laser Aerosol Spectrometer (Mini-LAS) instruments from the new generation are based on the well-renowned optical measurement technology by Grimm, yet with a completely new design and electronics that offer numerous new possibilities for smooth operation and data handling.

The new Mini-WRAS is a highly compact and portable instrument that combine optical detection and electrical mobility in one single spectrometer. The aerosol size range is from 10 nm to 25 mm divided into 40 size channels.


11-E brochure                   11-R brochure                   Mini-WRAS brochure



Several new instruments introduced by Grimm

Our partner Grimm has introduced 3 new instruments for measurement of air quality.

The new EDM 11-E instrument corresponds to the former EDM 107 and is intended as a hand-held instrument for ambient air quality measurements. The new 11-R corresponds to the old 1.109 instrument and is intended as a hand-held instrument for measurement of indoor air quality. Both Mini Laser Aerosol Spectrometer (Mini-LAS) instruments from the new generation are based on the well-renowned optical measurement technology by Grimm, yet with a completely new design and electronics that offer numerous new possibilities for smooth operation and data handling.

The new Mini-WRAS is a highly compact and portable instrument that combine optical detection and electrical mobility in one single spectrometer. The aerosol size range is from 10 nm to 25 mm divided into 40 size channels.


11-E brochure                   11-R brochure                   Mini-WRAS brochure



Control Sistem´s new ammonia analyser

Control Sistem´s has launched a new product, the NH3 Analyzer, for analyzing emissions of ammonia in engine exhaust. The product is based on LDS6 from Siemens; this is a world recognized leader in the supply of laser sensors, but common installation is extremely complicate in engine test cells (it was first developed for chimney application). Control Sistem integrated the sensor in a cabinet containing a specific sampling system and control unit that allows managing it as a common analysis cabinet. The product is fully compliant to EU and US actual regulations. The first installation of the NH3 Analyzer has already been made for a customer.



Topas AFS 155 filter leak testing by oil thread test

The oil thread test mentioned in ISO 1822-4, appendix A is used for visual proof of the absence of leakage of HEPA filters. This simple quality test procedure may be an alternative to the scan method.

The oil thread test (DOP Test) is also applicable if the scan method is not fully applicable because of the filter design (e.g. V-shaped arrangements).

For scanning of HEPA and ULPA filters, Topas offers the Filter Scanning Test Rigs AFS 150 and AFS 152 - well proven and reliable solutions.


AFS 150 brochure



Pegasor presentation from the JSAE Annual Congress, May 21-23

Pegasor reports that even though the long awaited report from JRC in ISPRA has still to be published they can confirm that the Pegasor technology, as exemplified by the Mi2 and Mi3 units, combined with a catalytic stripper, has satisfied all the criteria and testing so far undertaken. The Pegasor units are the only ones (out of 4 candidates) to do so. Pegasor realise that many of you have been waiting for the final report before moving ahead with this important next stage in your provision of real world fine particle data to your clients, and will be pleased to share the data supplied from JRC whilst waiting for the JRC report. Some of the results were presented today by Pegasor at the JSAE Congress in Tokyo and can be downloaded via the link below.


JSAE Presentation



The new DLPI+ gravimetric impactor has been launched by Dekati

DLPI+ is a new gravimetric impactor by Dekati. The new impactor generation has several improvements compared to the previous DLPI low pressure impactor. DLPI+ has 14 impactor stages from 16 nm to
mm. Moreover, it is based on the same design as the ELPI+, enabling an easy upgrade from DLPI+ to ELPI+™ to obtain real-time size distribution measurement. The DLPI+ control unit has built-in pressure measurement and adjustment. The impactor outlet temperature can also be measured in the control unit and there is an option for also measuring the impactor inlet temperature. 

The DLPI+ impactor is also offered in a special version that enables heating up to 180°C for high-temperature applications. In this option, the temperature controller for the heater is integrated in the DLPI+ control unit.


Deliveries of the new DLPI+ starts after the summer vacation in 2014. Contact us for more information. 


DLPI+ release                   DLPI+ brochure



New application for Pegasor M-Sensor, Soot measurement from small scale combustion

Through a series of experiments conducted by ExIS AB at a leading research institute in Sweden, Pegasor’s M-Sensor proved its ability to measure soot from small scale combustion device effectively. Soot measurements on small scale combustion devices were executed without any physical modification to the sensor itself, although with a different trap voltage setting to provide the best accuracy for PM measurement. The soot emission from small scale combustion device is expected to vary between different systems hence the M-Sensor should be calibrated for PM against gravimetric PM measurement specific to the system under measurement.

Most of the contemporary small scale combustion devices are expected to emit soot within the limits tolerable to the stand alone Pegasor M-Sensor. For small scale combustion devices with higher soot emissions, the Mi3 system with integrated dilution is recommended. A detailed summary of about measuring soot from small scale combustion device using Pegasor M-Sensor is provided via the link below.


Combustion, application note

M-sensor brochure                     Mi3 brochure



On-board particle emission measurement using Pegasor M-sensor

ExIS AB in association with Pegasor, Finland has initiated a measurement campaign in Stockholm to measure particle emission from vehicles in real time. These measurements highlight the significance of measuring particle emission in real time driving condition. The preliminary tests covered on-board measurements on passenger cars, both diesel and gasoline with different engine technologies CRDI, MPFI, GDI, Flex fuel (E85) available in the market.

The results indicate significant difference in particle emission from cars using different technology and different fuels. Similarly vehicle operation such as cold start, hard acceleration, coasting etc. as well has noticeable impact on the particle emission from the vehicles. From the data gathered so far, CRDI car with DPF seems to be the least polluting in terms of particulate number and mass. Although this experiment was an inception study and did not follow the strictest scientific practice applicable, the data gathered in the experiment provides a candid snapshot of the level of particulate emission from passenger cars. A detailed summary of the tests can be provided on request



On-board measurement of solid particle number with NanoMet3 from testo

An update on the testo NanoMet3 instrument for on-board measurement of solid particle number is provided in the latest issue of Automotive Testing Technology (ATT) magazine.

The new portable emission measurement system (PEMS) measures the concentration and average diameter of solid particles in the size range of 10-700nm under real driving conditions. It performs highly accurate measurements with online response over a wide range of concentrations. To measure only the solid particle fraction, it is necessary to condition the sample thermally to eliminate the volatile fraction. Testo NanoMet3 features a conditioning of the exhaust probe according to (formerly) Matter Aerosol’s patented ThermoDilution principle, which is fully PMP compliant. Measurements on chassis dynamometers have shown correlation factors >95% for particle number compared to PMP benchmark systems.


Article and ad in ATT



Topas aerosol generator FCS 248

Topas has introduced a new aerosol generator FCS 248 intended as a calibration system for aerosol photometers and air particle counters. FCS 248 can consistently produce aerosol with similar characteristics in the size range of 0,1 to 0,5 mm and can produce a maximum mass flow rate of 1 g/m3. This device has compact dimensions, weighs 15 kg and can be operated using battery making it convenient to handle. Three instruments can be attached to it at the same time for calibration; the calibration is effected by means of the comparison between the three attached instruments. At the moment, the brochure is only available in German.


FCS 248 brochure (in German)



Product demonstration videos - Grimm

Grimm has added a series of demonstration videos at their website. These videos can be accessed through this link. These videos vividly describe the functionality, operation and salient features of Grimm instruments.



High resolution ELPI+™ - now available

Dekati has launched a new version of the ELPI+™ instrument, the Dekati® High Resolution ELPI+™ (HR-ELPI+™). The High Resolution ELPI+™ has new software with a unique data inversion algorithm that gives either 100 or 500 size classes from 6 nm up to 10 µm. This makes the Dekati® High Resolution ELPI+™ a superior tool for particle size distribution measurements. It gives the largest size range possible with any single aerosol measurement instrument, and it gives more size resolution that any other instrument in this size range.

The data inversion algorithm used in the HR-ELPI+™ is based on iterative calculation method and determined impactor stage Kernel functions (Järvinen, et al., J. Aerosol Sci. 69, pp. 150-159, see link below). The article mentioned is available for download free of charge at JAS website. Publications about the data inversion algorithm are being prepared.

The HR-ELPI+™ instrument is available for ordering and the first deliveries can be made in a couple of months. Present ELPI+™ instruments can be upgraded to the High Resolution ELPI+™ version. For the newest ELPI+™ instruments the installation can be accomplished by upgrading firmware and software. Older ELPI+™ instruments may also need a hardware upgrade of the memory card with the new firmware. Upgrades can be made at customer site by ExIS staff. Contact us for pricing and more information.


J. Aerosol Sci. paper                  HR-ELPI+™ brochure



ELPI+ upgrades to HR-ELPI+ and HT-ELPI+ versions

With the introduction of the high-resolution, HR-ELPI+ (see also previous news article below on this topic), that offers 500 size channels and the high-temperature, HT-ELPI+, versions of the ELPI+ instrument, Dekati can offer high-tech aerosol instruments with unrivalled performance. Now, we would also like to remind current ELPI+ users of the opportunity to upgrade current ELPI+ instruments to either of these versions. The first upgrades of some of our customer’s instruments have already been made. Please contact us for more information. Brochures for each of the mentioned instruments can be found via the links below.


HR-ELPI+ brochure        HT-ELPI+ brochure



Grimm 11-E optical aerosol spectrometer 

The new Grimm 11-E optical spectrometer was launched late 2015 and the first deliveries started early 2016. The 11-E instrument is based on a chassis with the same form factor as the well-renowned 1.108 and 1.109 instrument but with completely new electronics and all the modern i/o and communication interfaces, such as, e.g.: SD-card, USB A/B, Bluetooth, Ethernet and RS-232. In that respect, 11-C is quite similar to the 11-R and 11-E instruments previously introduced. Please contact us for more information.

The 11-E brochure can be found via the link below.


Grimm 11-E data sheet



Testo’s DiSCmini at ETH Nanoparticle Conference in Zurich

We invite you to visit the testo booth (#12) to find out more about the testo instruments. On display, among other things (see portfolio in the link below), is the currently smallest nanoparticle instrument in the world, testo DiSCmini. An interesting instrument for automotive on-board emissions is the testo NanoMet3, a portable emission measurement system for on-board particle counting and classificatoin.

The new testo DiSCmini & testo NanoMet3 brochures and the portfolio of testo instruments exhibited at the ETH Nanoparticle Conference can be found via the link below. Please
contact us for more information.


DiSCmini brochure          Testo portfolio at ETH Nanoparticle conference           NanoMet3