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.

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ExIS Newsletters

Control Sistem’s new engine test cell is ready

Control Sistem’s Testing Center in Pianezza (Turin, Italy) is now equipped with a new engine test cell. This is definitely not an ordinary test cell. Engines up to 510 kW and 9000 rpm can be tested covering most needs for automotive passenger car engine as well as all but the very largest heavy-duty engines. The test cell has Control Sistem’s altitude simulation EACS (Engine Altitude Conditions Simulator) installed that enable simulating various altitudes (-500 to 5 000 m), temperatures (from –30 to 50°C) and humidity.


The test cell is equipped with instruments for gas analysis of regulated emission components (Horiba MEXA 7200D), unregulated components (V&F mass spectrometer), particulate matter gravimetrically and real-time (PSS-20 with Pegasor PPS-M sensor), particle number (MEXA 2000 SPCS) and an opacimeter. All the instruments and sub-systems in the test cell are fully integrated using Control Sistem’s internally-developed software platform INT-9000. Besides the mentioned analysers, basically all the equipment and software solutions used in the test cell has been developed by Control Sistem, which makes this test cell an excellent showcase of all that can be offered by Control Sistem in this field.


The engine test cell is now available for demonstrations and commissioning of engine testing. Please contact us for more information. 


Control Sistem press release              Test cell info          Testing center (new) brochure

EACS info


The new Pegasor integrated measurement unit, Mi2, is launched

The Mi2 was launched at Testing Expo in Stuttgart on June 12. The integrated Pegasor Particle Sensor has been designed especially for particulate mass and number emission monitoring on board vehicle and / or at engine test bench. The full system includes measurement unit and air supply unit. Measurement unit is built around Pegasor M-type sensor and all necessary auxiliary components are integrated to secure proper operation of the sensor. Air supply unit comprise compressors, cleaning and drying of the compressed air and communication to the measurement unit. To enable convenient use, both units can be placed separately on-board the vehicle or in the test cell.

Features of the measurement unit are:

¨ Sensor equipped with internal heater to secure non-condensing conditions

¨ Sensor protected from contamination while not in measurement mode. Inlet and outlet valves are closed automatically and power to the sensor turned off

¨ Sensor self-diagnosed and user warned if any problem with the sensor operation

¨ Automated sensor zeroing

Features of the air supply unit are:

¨ Output capacity: 12lpm @ 1,5bar dried and filtered air for Pegasor measurement unit

¨ Connection to the measurement unit: 1/8” quick connector for tubing

Heated sampling lines at 3 or 6 m length are offered as accessories. Heating control of the sampling lines is managed by the Mi2 unit. Upgrades of current “stand-alone” Pegasor PPS-M sensors are possible on request.

More information on the Mi2 will be posted on ExIS and Pegasor home pages shortly.



Calibration and performance of Pegasor´s PPS-M presented at EAC 2012

Today (September 3, 2012 at 15:00-15:20) the Laboratory of Applied Thermodynamics (LAT) at the Aristotele University in Thessaloniki, Greece presented results on the calibration and performance of the Pegasor PPS-M particle sensor at the European Aerosol Conference (EAC 2012) in Granada, Spain.

Based on both a comprehensive theoretical model and extensive experimental data, LAT has carried out a “universal” calibration of the PPS-M sensor for exhaust particle mass (PM) and number (PN). The calibration has been validated on diesel as well as on GDI (gasoline direct injection) exhaust. Now, detailed information on this calibration is provided in the presentation at the EAC 2012. The presentation can be downloaded via the link below:

LAT presentation at EAC 2012.

For the sake of providing a complete picture, it should be mentioned that Pegasor has recently also implemented a “size-insensitive” calibration for particle mass (see news note from May 7, 2012 below). This calibration is optimized for mass only and not for particle number simultaneously as the “universal” calibration by LAT. Both calibrations are user selectable via the PPS-M software (version 2.0).



Update of the product line of Topas

Topas line of products has now been updated in an overview brochure. Since the product line of Topas is very comprehensive, this brochure provides an convenient introduction to both products and applications.

Topas overview brochure.


New MD19-3E Rotating Disk diluter from Matter Engineering

The new MD19-3E rotating disk diluter from Matter Engineering has now been introduced. Modifications and new materials has significantly improved disk/block lifetime. Improvements in many other areas have also been made. Updates are available for in-use units. Contact us for more details (e-mail).

MD19-3E News                             MD19-3E brochure


Last update: 2017-11-22

Update of ELPI and DMM instruments from Dekati

Since early 2009, the new version of the DMM instrument (DMM-230a) offers real-time particle number concentration measurements in addition to previous features such as mass concentration and size information (mass median diameter and geometric standard deviation). Since spring 2009, the AK protocol can also be provided as an option for instrument control (e.g. start, stop, flush, etc.) and data acquisition to the host computer. Older DMM units can be upgraded to the DMM-230a version.

A 16-channel PCI board for analogue output of ELPI measurement data is now available for much more convenient data acquisition by external measurement systems. For the “outdoor air” OELPI, used in ambient air monitoring, an USB memory  stick can now be used for simpler data transfer from the instrument to other data storage.

ELPI PCI board for data acquisition


New Topas Aerosol and Dilution System (ADD 356)

To avoid contamination in hospital operating rooms, a laminar clean air flow is applied to the operating table. For verification of this system, a defined test aerosol is distributed at six different positions according to the German DIN 1946-4 and Swiss SWKI 99-3 standards. The Aerosol Distribution and Dilution System ADD 536 was designed to fulfil these requirements. Many other applications, such as simultaneous calibration and alignment of particle counters are also possible. More information is provided in the ADD 356 brochure.


Back to News page...

Update of automotive particle number measurement systems from ExIS

Particle number measurements in automotive exhaust is now an established technology. We have made an overview of the instruments and equipment that ExIS provide in this field. This overview is not limited to the Particulate Measurement Protocol (PMP) of UN ECE (used in EU emission legislation) but covers also alternative measurement methods. Our portfolio of instrumentation is the most comprehensive among any distributor of such equipment.

PMP overview



Dekati PM-10 impactor fulfils the new ISO standard for stationary source emissions

A new ISO standard is released for Stationary source PM10 and PM2,5 emission measurements.
ISO 23210: Stationary source emissions — Determination of PM10/PM2,5 mass concentration in flue gas — Measurement at low concentrations by use of impactors. The Dekati PM-10 impactor meets the standard requirements and is validated for these measurements. Sampling can be made inside or outside the smokestack.

Dekati home page          ISO standard


Dekati high-temperature sampling

We are now able to offer a high-temperature sampling and dilution system, i.e. up to 1 000°C and higher, for immediate delivery. The unit is based on a modified Dekati DAD-100 axial diluter. It uses a ceramic pipe and reversed flow of cooled dilution air to cool the joint between metal and ceramic parts. The first unit has already been delivered to one or our customers in Trondheim, Norway.


Grimm EDM 180 passes equivalence test

The standard 19" rack Environmental Dust Monitor (EDM) of the series 180 have been tested in Europe at different sites in Austria and fulfilled the requirements in accordance to the European regulation for PM10 and also PM2,5. Therefore, this is the first unit of this optical kind able to report officially both values in 1 min intervals. In addition, this version has also the capability to present the PM1,0 value as well as the Tc Value (Total Count, a new way to explain the aerosol distribution in the atmosphere). This will help in the understanding of the mass concentration and is a continuous measurement level of the air (aerosols). With the documentation from the Austrian tests mentioned, we hope to receive an approval in Sweden also in the near future.

Grimm home page                EDM 180 brochure


ExIS starts co-operation with Pegasor

In the summer 2009, ExIS and Pegasor initiated a co-operation. Pegasor is based in Tampere, Finland. The Pegasor Particle Sensor (PPS) is based on novel technology. Exhaust is sampled by using a built-in ejector. The operating principle of PPS is based on particle charging and electrical detection. PPS does not collect particles and the charger is shielded by clean air, implying an extremely long time between cleaning. Its sensitivity is high enough for measurements after a particle filter (DPF). PPS has a potential sampling rate of up to 100 Hz. Besides stand-alone operation, PPS will be used in the future as a component in integrated measurement systems in, e.g., for particle number measurements according to PMP requirements and for on-board PM measurement systems.

Pegasor home page


Interesting results with the Dekati DMM instrument in the heavy-duty PMP programme

Phase 3 of the UN-ECE Particulate Measurement Programme (PMP) comprise an inter-laboratory correlation exercise. Besides mass and particle number measurements, two additional instruments, i.e. the AVL Micro Soot Sensor (MSS) and the Dekati DMM, were used to characterize particle emissions. Since MSS measure soot mass and DMM measure solid particle mass, the results are complementary and thus, can provide new insights. Over the cold start WHTC test cycles, both instruments measured mass concentrations ~10% of those determined gravimetrically. This fraction is similar to that determined for cold NEDC tests during the light-duty inter-laboratory correlation exercise. In the hot start test cycles, DMM shows that the contribution of solid particles was only 0,5% of the gravimetrically determined PM, i.e. volatile particle mass contributed to total PM by ~99,5%. For more details we refer to the draft report and the summary of DMM tests compiled by ExIS. Links to the mentioned documents are provided below.

2010-01-05                                           ExIS summary of DMM results              Draft HD PMP report

Dekati DEED new golden standard in PMP

A Volatile Particle Remover (VPR) system based on the Dekati Engine Emission Diluter (DEED) has been announced to be the “golden” standard for the UN-ECE Particulate Measurement Programme (PMP) VPR calibration. The calibration study will consists of round robin measurements at several test laboratories in Europe. The low particle losses of the DEED in comparison to all other dilution systems is certainly a significant advantage for VPR calibration. A summary of the VPR test results is provided by ExIS in a separate document, accessible below and in addition, a link to the draft heavy-duty PMP report is also provided. Further information on this topic is also found under the heading about the DMM tests below.

2010-02-16        ExIS summary of VPR results                Draft HD PMP report

The Pegasor PPS sensor has been launched

The Pegasor Particle Sensor (PPS) has been launched. Production started in March and the first batch of some 10 sensors was delivered to various customers by end of March. Demonstrations at customer sites have already been made and more of these activities are planned during spring/summer 2010. Please contact us if you are interested for a demonstration.

PPS measure directly in raw exhaust and thus, it need no external sampling and dilution. The simplicity and robustness of the PPS has been specifically developed to provide environmentalists, hygienists, and authorities to develop realistic management strategies. At a sampling rate of up to 100 Hz, PPS provides exceptional time response.

The Pegasor particle sensor operates by electrostatic charging of particles passing through the sensor and then measuring the current caused by the charged particles leaving the sensor. The flow-through design keeps the sensor clean for extended operation and low maintenance. The particle charger is only exposed to clean air. More information is provided in the brochure and our latest newsletter.

2010-04-16        PPS brochure                             ExIS News, April

New Topas instruments

Three new instruments from Topas have been launched.

PAP 610. The Process Aerosol Photometer Topas PAP 610 was developed for in-situ-concentration measurement of blow-by aerosols. This measuring instrument is an addition to the Gravimetric Measurement System GMS 141, which is also provided by Topas. The GMS 141 is used for calibrating the PAP 610.

GMS 141. Oil mist separators are basic components of a crank case ventilation system. The Topas gravimetric measurement system GMS 141 allows the comfortable detection of oil content in blow-by after oil mist separators with a filter blank sheet or filter cartridge directly on engines or engine test stands. The measuring device combines a simple and rugged assembly with an economic low-cost manual application and handling. The device is controlled via visualisation in a web browser.

MBP 116. Performance of filter media is essentially defined by parameters such as differential pressure, gravimetric filtration efficiency and dust holding capacity. The Topas Manual Filter Media Test Rig MBP 116 can be applied to determine these filter parameters at flat sheet materials. This test rig has been designed as universal testing equipment. It combines a simple and robust setup with a manual and therefore cost efficient handling and operation.

2010-04-16        PAP 610 brochure      GMS 141 brochure   MBP 116 brochure

Ash cloud measurements with Pegasor PPS sensor

Ash cloud measurement is now possible with the Pegasor PPS sensor. More information is provided in the press release from Pegasor (19 April).


Car brakes just as big an environmental problem as studded tyres

Research at the Royal Institute of Technology (KTH) shows that particles from vehicle brakes are so small that they could cause the same respiratory diseases as studded tyres. Car brakes contribute as many particles as studded tyres and the car’s exhaust gas emissions do. The particles from a car's brakes are less than 10 µm in size and even go down to nano sizes, which means that they can enter the human body. Particles are generated both during braking and when brakes are not used, since brake pads rest against the discs to keep them clean in the latter case. To date, five publications in Scientific Journals and at International Conferences have been made from this research.

In the research at KTH, several particle instruments from ExIS partner Grimm Aerosol has been used to generate test data.

More information is provided in the press release (both in English and Swedish) from KTH (25 May).

Press release, English                                                    Press release, Swedish


Testing centre at Control Sistem

Control Sistem has developed and set up an innovative Testing Center for both own development purposes and contract research & development commissioned by customers. The Testing Center was inaugurated and made available for testing in the beginning of 2010.

The emission room is the outstanding feature of the Testing Center and was fully designed and constructed by Control Sistem using state-of-the-art technology for measuring exhaust gas and particulate on all types of vehicles. Each solution is conceived to respond globally to customer requirements through complete, exclusive operability. All instruments and equipment in the Testing Center has been fully integrated in the Testing Center for control and data logging by using the in-house developed INT9000 software.

More information is provided in our June newsletter and in the Testing Center brochure.

ExIS Newletter, June 2010                             Testing Center brochure


High altitude simulation with EACS from Control Sistem

The Engine Altitude Condition Simulator (EACS) from Control Sistem is an innovation that allows testing internal combustion engines in a wide range of ambient pressure conditions, from sea level up to 5000 m altitude. EACS offers possibility to perform any kind of stationary or transient test thanks to a very fast and reliable regulation system able to maintain the pressure level within ± 10mb of the set point, in steady state or transient conditions.

EACS has been launched on the market and has already received great interest from major European car and engine manufacturers as well as component suppliers. Customer demonstration of the EACS system can now be made in the new testing centre (see note below) of Control Sistem in Pianezza outside of Turin. Contact us on phone (+46-8-647 45 99) or e-mail to schedule a demonstration.

More information is provided in our June newsletter and in the technical description.

ExIS Newletter, June 2010                             EACS technical description


Matter Aerosol

With effect of 1 July, 2010, Matter Engineering has become a 100% subsidiary of Testo in Lenzkirch, Germany (

Under the brand name "Matter Aerosol", the team of specialists in Wohlen, Switzerland will continue to develop and manufacture high-profile nanoparticle measuring equipment for automotive, laboratory and ambient applications. Matter Aerosol products will be marketed through existing distribution network also in the future.

With the support of Testo, Matter Aerosol envisage a slight shift towards more long-term oriented research and development projects at much enhanced efficiency. Testo's expertise in innovation transfer and large-scale production will boost access of Matter Aerosol technologies to new markets.


Control Sistem’s full-flow CVS sampling system is now available

The CVS-R03 full-flow constant volume sampling system (CVS) from Control Sistem for light-duty test cells has—until now—not been actively marketed by ExIS on the Nordic market. Now, this product has been included in the ”standard” range of products from Control Sistem and thus, we can now provide this measurement system for our customers.  CVS-R03 use a variable-speed positive displacement pump (PDP) for flow control and it can be fully integrated in the test cell by e.g. using Control Sistem’s own software INT9000 for this purpose. CVS-R03 is available in four different sizes.

More information about CVS-R03 is available in the brochure and the technical description.

CVS-R03 brochure                                  CVS-R03 description


Control Sistem introduces new products for dynamometer testing

Three new products intended for dynamometer testing have been introduced as ”standard” products by from Control Sistem and are now also available on the Nordic market. These products are:

DYNOsaur is a 48’’ single roller chassis dynamometer for light-duty vehicle and light commercial vehicle (up to 5 500 kg) testing. DYNOsur conforms with European and US standards. The DBS automation system (see below) is used to control the system and integration in the test cell is accomplished by the INT9000 software also developed by control Sistem.

xPA is a pedal actuator for automated testing at chassis dynamometers and in other test rigs. The xPA is bed on the same technology that has already been used in the driving robot DREAMS.

DBS is an automation unit available in three different versions for engine, roller and transmission test benches. DBS is an interface to control electric motors, throttle, speed, torque, temperatures etc.

More information about DYNOsaur and xPA is available in the brochure and the technical description via the links below. Information about the DBS will follow shortly. 

DYNOsaur description                            xPA brochure                           


Dekati’s new ELPI+ instrument gain much interest at the IAC conference

The new ELPI+™ (pronounced ELPI plus) instrument from Dekati was launched at the International Aerosol Conference (IAC) in Helsinki on Monday, August 30. The interest from the conference delegates is great and the Dekati booth has hardly ever had so many visitors before. Two scientific papers on the ELPI+ will be presented at IAC on Thursday and Friday, respectively.

Construction of the ELPI+ has been simplified, yet maintaining the unit as robust as the previous ELPI model to endure operation even in harsh conditions. At the same time, the weight of the ELPI+ unit has been reduced to 22 kg, making it more easily transportable. ELPI+ has more measurement channels, improved sensitivity, higher time resolution (10Hz) and several new features compared to the “old” ELPI. The impactor has fewer parts and is much more convenient to handle and easier to clean.

During the development phase of more than two years, ELPI+ has been field tested thoroughly by Dekati. This has been accomplished by conducting several measurement campaigns, where ELPI+ and the previous ELPI have been used in parallel.

ELPI+ is now ready for ordering. The first units will be delivered by end of 2010. Delivery time is currently about three months but will be shortened when production is ramped up. Under a transitional period, the “old” ELPI will be produced in parallel with ELPI+. Supply of spares and support for the old ELPI will continue for many years to come.

Dekati newsletter on ELPI+                ELPI+ brochure                      Dekati news about ELPI+


Grimm EDM 180 approval in Sweden as equivalent method for measuring PM10 and PM2,5

So called “reference methods for sampling and measurement of particles smaller than 10 and 2,5 micrometres respectively (PM10 and PM2,5) according to Swedish and EN/ISO standards (SS-EN 12341:1998 and SS-ISO 10473:2000) imply that particles pass through a selective inlet and are collected on a filter for weighing. This is a labour-intensive and complicated method that, in addition, does not provide any opportunity for real-time measurements. In order to achieve real-time measurements of PM10 and PM2,5 (and other size classes), gravimetric measurements cannot be made but other measurement principles must be used. Therefore, instruments that do not use the reference method are classified as an “equivalent method” by the Swedish Environmental Protection Agency (SEPA). In order to obtain an approval for an instrument as equivalent method, comprehensive correlation measurements and documentation of the results are necessary.

Our partner Grimm Aerosol in Germany has developed an instrument, “Environmental Dust Monitor” (EDM 180 and similar instruments in this family), which previously has obtained approvals for measurement of air quality in several countries in, among others, Europe. Based on an assessment conducted by the Reference Laboratory for urban air at the Department of Applied Environmental Science at the Stockholm University, the Swedish EPA is now recommending the EDM 180 as an equivalent method to the reference method for control of environmental quality norms for ambient air according to NFS 2010:8.

Recommendation from Swedish EPA (in Swedish)


Overview of GRIMM’s new line of stationary CPCs

A brochure that provides an overview of the new line of stationary CPCs (# 5.410— 5.420) is now available. An interesting feature is the preconfigured netbook (mini PC, including software) delivered with the CPCs.

GRIMM stationary CPC brochure


New Topas instruments

New instruments from Topas are:

LAP 322. The LAP 322 particle size spectrometer is a further development of the proven LAP 321 instrument. The new LAP 322 has an extended measurement range; i.e. the lower limit is now 0,2 mm (0,3 mm for LAP 321) and the upper limit is 40 mm (30 mm for LAP 321). The maximum number of size channels is 128.

HDS 561. The new dilution system HDS 561 provides a reliable and very high single stage dilution. Furthermore, it is adjustable, ranging from 1:100 to 1:100 000. It can be customized for flow rates from 2,8 to 100 l/min. The pressure drop is very low. This dilution system is particularly suited for clean room validation but will work also in many other applications.

PAP 612 & GMS 141. For measurement of combustion engine blow-by gases, Topas offer both fully-equipped test rigs and instruments. The PAP 612 is an optical instrument, which can operate in over- or underpressure. It is primarily designed for investigations of crankcase ventilation systems on combustion engines. Due to its compact design, PAP 612 can even be used for on-board measurements. GMS 141 is a gravimetric measurement system for measuring oil content in blow-by gases. The filter box can be heated to avoid condensation. The measuring device combines a simple and rugged assembly with an economic low-cost manual application and handling. Control is made via a web browser.

LAP 322 brochure                                               HDS 561 brochure

PAP 612 brochure                                               GMS 141 brochure


First deliveries of Pegasor PPS-M sensor and Dekati ELPI+™  instrument

The first deliveries of the Pegasor PPS-M sensor was made end of 2010 and beginning of 2011. Similarly, the first deliveries of the new Dekati ELPI+™ instrument will be made this week and during the next couple of weeks.


DiSCmini from Matter Aerosol is now launched

The “Diffusion Size Classifier” or DiSCmini, from Matter Aerosol is a portable sensor for the measurement of particle number and average diameter with a time resolution of up to 1s (1Hz). The simultaneous capture of number concentration and particle size allows the specification of other characteristic parameters, such as the particles surface (Lung Deposited Surface Area, LDSA). This technology is not only available in a handheld version but also as a robust desktop unit (DiSC). Both are battery-operated and data can be recorded on a memory card. DiSCmini is particularly efficient for personal exposure monitoring in working environment with exposure to e.g. diesel soot, welding fumes, industrial nanomaterials.

The DiSCmini is based on the electrical charging of the aerosols. The charged particles are then detected in two stages by electrometers. The first detector stage is a pile of steel grids, small particles will preferably deposit on it by diffusion. The second stage is a high efficiency particle filter which captures all the other particles. The mean particle size can be obtained by analysis of the two currents measured on the stages. The size range is from 10 to 300 nm.


Flyer on DiSCmini from Matter Aerosol is now available

A flyer for the “Diffusion Size Classifier” or DiSCmini from Matter Aerosol is now available. A dedicated website for the DiSCmini has also been created. This site will be used for posting more information with technical details and scientific data on the DiSCmini instrument. More information is available via the links below. A brochure on DiSCmini will follow in about 2 weeks.

DiSCmini flyer       DiSCmini website             Matter Aerosol website


Grimm EDM 180 now also approved by US EPA

With the approval of the Environmental Dust Monitor , EDM 180, by US Environmental Protection Agency (US EPA) on March 22, this instrument is now approved basically in the whole world. EDM has been previously approved most countries in Europe, including Sweden. Many countries outside USA use approvals by US EPA and EDM 180 is therefore, de facto approved in many other countries. No other real-time instrument for ambient air monitoring according to “equivalent methods” has been approved in so many countries. The gravimetric “reference method” cannot provide more than one size of PM and does not provide real-time data. EDM 180 can, in the most advanced version, measure PM10, PM2,5 and PM1,0 simultaneously and, in addition, particle number emissions in 31 channels from 0,25 to 32 mm. No other approved instrument is based on optical detection. EDM does not need any corrections for measurement site (geography) or climate.

Grimm home page


Pegasor PPS presentation at the 2011 SAE Congress in Detroit

Efforts to develop a sensor for on-board diagnostics (OBD) of diesel vehicles are intensive as diesel particulate filters (DPFs) have become widespread around the world. A study on this topic was presented at the SAE Congress in April 2011 by the Aristotele University in Thessaloniki and Pegasor. The PPS sensor was successfully tested for OBD diagnosis of damaged DPFs in real-exhaust of a diesel car and a diesel engine. The sensor provides high resolution and sensitivity superseding OBD requirements. The sensor was used on an engine to monitor the efficiency of damaged DPFs (see X-ray photo to the left). The sensor was then installed in the exhaust of a vehicle to test the DPF efficiency of a well operating and a damaged DPF over a transient test. The sensor was found to be sensitive enough to clearly detect a defected from a well-operating particle filter even at levels as low as 6 mg/km. This study demonstrates that a soot sensor based on the escaping current technique has the potential to be used for OBD and DPF control on forthcoming light duty and heavy duty diesel vehicles.

The presentation from the SAE Congress on the Pegasor PPS sensor is now available for downloading via the link below. A link to the abstract is also included below. The corresponding SAE Paper (#2011-01-0626) can be purchased via the home page of SAE.

SAE Presentation              Abstract at SAE Website


Pegasor PPS-M presentation at ETH Nanoparticle Conference 2011

Two interesting presentations on the Pegasor PPS-M sensor were made at the ETH Nanoparticle Conference by West Virginia University (WVU).  WVU has tested the PPS-M sensor in various applications such as, e.g. engine and chassis dynamometers as well as in on-board applications for in-use testing. The presentations concentrated on testing on dynamometer test cells. In particular, NTE (Not To Exceed) in-use testing and various inter-comparisons with other instruments were reported. 

WVU (Besch) at ETH                WVU (Cozzolini) at ETH

2011-08-19 (updated 2011-09-19)

ELPI+ update

ELPI+ development continues and new features will be introduced in the near future. Sintered collection plates are now available for ordering. A heated setup is also in the pipeline. Firmware updates via the USB port will be possible. Digital data output via an additional port will be added on new units. Last but not least, the AK protocol for automotive applications will be available on request.

Most welcome for new orders is that production optimization will decrease the delivery time from current
6-8 weeks to 2-4 weeks. ELPI+ is available for
demonstration during the autumn of 2011.

ELPI+ brochure               


The brochure on DiSCmini from Matter Aerosol is now available

The brochure for the “Diffusion Size Classifier” or DiSCmini from Matter Aerosol is now available for downloading (use link below). This unique hand-held size classifier has gained a lot of interest lately. DiSCmini can be used in many applications where, until now, full-size instruments have been the only option.

DiSCmini brochure          DiSCmini flyer                   Matter Aerosol website


Pegasor PPS-M sensor update

The PPS-M sensors delivered after the summer 2011, will incorporate a number of improvements. There are improvements both in the electronics (less noise and drift) and the mechanical hardware (flow path) that will improve signal quality and the already very good time response. We can now also offer the AK protocol for communication with a host PC in the test cell. This is a most welcome feature in the automotive industry. Later, we will also be able to provide communication via the CAN bus.

Please also look at the latest publication on PPS-M at the ETH Nanoparticle seminar, as shown in the news below.

PPS brochure


German TÜV certificate for PSS-20 and Micro-PSS from Control Sistem

Currently, type approvals for measurement instruments are not issued by EU or any other authority. It is up to the instrument manufacturer to prove that the requirements are fulfilled. As this is not always a satisfactory solution, Control Sistem commissioned German TÜV to conduct a “third party” assessment. The result from this work is that Control Sistem now has received Certificates from TÜV that both Micro-PSS and PSS-20 fulfils the requirements for all major emission standards. Links to the certificates are included below. Please contact us if you also want to obtain the test reports. 

Micro-PSS certificate                  PSS-20 certificate

Micro-PSS brochure                   PSS-20 brochure


Time response of the Pegasor PPS-M sensor presented at EAC

An evaluation of the time response of the Pegasor PPS-M was presented by the French Institute IRSN at the European Aerosol Conference (EAC 2011) in Manchester, September 4-11. Characteristic time response for a step increase was ~0.18 s and ~0.23 s for step decrease. In this very comprehensive laboratory study an aerosol generator and synchronized magnetic valves were used to make step changes of the concentration (up/down). A very good linearity (vs. CPC) for a defined particle size was found. A report (in French) on this topic with further details has also been published by IRSN.

A comment from Pegasor staff is that the new electronic unit introduced this autumn, as described below, improves time response in comparison to the PPS-M version tested by IRSN. Increasing the flow through the sensor is another way to further improve the time response. Please also look at the latest publication on PPS-M at the ETH Nanoparticle seminar, as shown in the news below.

EAC presentation               


The new Grimm FAPES has been launched

Grimm’s FAPES (Fast Aerosol Particle Emission Spectrometer) instrument has now been significantly updated in a new version. FAPES measures particles in a size range from 6.3 to 474 nm. FAPES is a true real-time instrument with a sampling rate of 10 Hz (internally, 100 Hz). FAPES provide data on particle size distribution in 25 difference size classes. The new instrument is based on 12 “Vienna”-type classifiers (10 in the previous version) and it use ultra-low noise Faraday’s cup electrometers for particle detection. Due to the electrical detection, FAPES gives reliable results without calibration and it can also be used to calibrate other instruments, e.g. CPCs. Due to the use of Faraday’s cup electrometers with rinsing air flow, leaking currents in the electrometers is not an issue. This is problematic in competitor’s products, where contamination requires frequent cleaning.

FAPES comes with a built-in sampling, dilution and conditioning system. Temperature can be varied from ambient up to 500°C and the dilution ratio can be varied from 1:5,7 to 1:40 in 7 steps. No pressurized air is needed since the dilution air is instead filtered, dried and purified from organic gases with active carbon. The range of working pressure has been extended to 0,1 – 2 bar(abs), enabling, for example, sampling before a diesel particle filter or in altitude simulation test stands. The sample is returned downstream the sampling point, so pressure fluctuation is not an issue.

The new FAPES instrument was displayed at EAC in Manchester, September 4-9, for the first time. Demo instruments are now available for testing. Please contact us for more information and/or a demo. More information is also available in the documents below.

FAPES brochure                Grimm’s Newsletter, September       


Matter Aerosol’s DiSCmini instrument is now available for demonstration!

The “Diffusion Size Classifier” or DiSCmini from Matter Aerosol is now available for demonstration. This unique hand-held size classifier provides real-time measurement of nanoparticles and has gained a lot of interest lately. DiSCmini can be used in many applications where, until now, full-size instruments have been the only option. Since some time, ExIS has this interesting instrument readily available for demonstration and we have now also gained own extensive experience of using the instrument.

For those of you who are interested in looking at data from the DiSCmini, we have prepared an MS Excel sheet with post-processed data from the DiSCmini. Example data.

Contact us for a demonstration. More information is available via the links below:

DiSCmini brochure          DiSCmini flyer                   Matter Aerosol website


Grimm EDM 365-SVC instrument for measuring of semivolatiles has been launched

The EDM 365-SVC instrument is technically based on the proven and robust GRIMM Environmental Dust Monitor EDM365 and has been designed to specifically determine the Semi Volatile Compounds (SVC) in the environment.

The new approach of GRIMM is based on measuring particles via two different probe inlet paths; one is the proven Nafion dryer without the loss of particles and semi-volatile particles; the other one uses in addition a heated sampling probe head prior to the optical measurement. This sampling probe head can be heated, depending on the application, up to an arbitrary temperature of 300°C. A mechanical valve switches automatically in adjustable intervals between the two sample air inlet paths. Calculating the difference between the two measurements allows not only the determination of the SVC for TSP, PM10, PM2,5, PM1, and for the total counts but also – and this is unique – for the size resolution in 31 channels starting at 0,25 µm up to > 32 µm. Due to the relatively short switching time between the two flow paths, a continuous measurement of the SVC fraction is enabled.

The EDM 365 is based on the same technology as the EDM 180 instrument and, therefore, it is approved as an equivalent instrument by the Swedish EPA for measurement of PM10 and PM2,5 in ambient air.

For more detailed information about the EDM 365-SVC instrument, please refer to the latest Grimm newsletter, available via the link below. Further information about the EDM family of instrument is found in the EDM catalogue and the documentation from Swedish EPA and the reference laboratory.

Grimm’s newsletter 4, 2011                                              EDM Catalogue

Recommended instruments (in Swedish)          Recommendation from Swedish EPA (in Swedish)


The new I-series of PSS-20 from Control Sistem has been launched

The new I-series of PSS-20 has been launched. The first unit was delivered to a German engine manufacturer. The most significant features of the I-series compared to the predecessor (H-series) are, in short:

· Smaller dilution air pump optimized for 47 mm filters (but still maintaining the use of 70 mm filters)

· EPA heated minitunnel as standard version and thermocouple for diluted gas stream temperature

· Modification of mixing point for easier adaptation to EPA requirements of maximum sample pipe length

· HEPA filter integrated in the trolley just upstream the conditioning system

· Improved heating regulators

Several other modifications (including various re-designs) of the PSS-20 not mentioned here have also been made.

Among the new accessories, the option of having 4 filter holders could be mentioned. The real-time mass emission capability is also a interesting option for many customers. The first successful tests at a customer site (Germany) of a PSS-20 equipped with a real-time particle mass sensor (Pegasor PPS) were made in September 2011. This option is now available for ordering. The firs unit with this feature was delivered by end of 2011. Upgrades for older PSS-20 units are available. 

Note that both Micro-PSS and PSS-20 fulfils the requirements for all major emission standards and has received an independent third-party certificate from German TÜV. 

PSS-20 brochure                          PSS-20 certificate


Engine Altitude Conditions Simulator (EACS) update

In December, Control Sistem successfully performed several emission tests (NEDC) for an external customer (FPT, Italy) at the chassis dynamometer in its Testing Centre simulating the conditions of a Brazilian laboratory located at 900m over sea level using the EACS. Result were very consistent with original data and allowed to FPT personnel to define new ECU strategies with no need to travel to America for this development phase.

The demonstrator EACS has now been moved to the newly built engine test cell at the Testing Centre for a permanent installation but it can also operate cars on the chassis dynamometer in the test cell nearby. Customer demonstrations can now be made in the Testing Centre. Contact us on phone (+46-8-647 45 99) or e-mail to schedule a demonstration.

EACS technical description


Dekati instruments in gas turbine measurements

There has been a significant increase in interest in measurements of particles produced by aircraft turbines. The development is led by SAE E31 and there should be a standard coming out in 2012. The development includes US EPA and European Union with EPA pushing for mass and EU for number measurement. The EU research is currently funded through the SAMPLE III program. Dekati is involved in this development in two ways; first and most importantly, the ejector diluter DI-1000 followed by DEED-100 is becoming the de facto standard for sample conditioning; Secondly, Dekati is also promoting measurement of total mass (soot+ash). This could be accomplished by using the Dekati Mass Monitor, DMM. Dekati has recently sold a number of dilution systems for turbine measurements proving that this is a viable application worldwide.


DMM brochure                   DI-1000 brochure           DEED-100 brochure       


Topas TDD 590 thermodenuder launched

When cooling of the aerosol sample takes place, condensation processes will occur and volatile particles can be formed by nucleation. The Model TDD 590 thermodenuder is designed to remove moisture and volatile particles from an aerosol sample for avoiding such measuring errors and the subsequent measurement of dry particle size. Volatile particles completely evaporate in the heating section. Active carbon surrounding the flow path of the particle-gas mixture removes the volatile compounds using the physical effect of adsorption. The TDD 590 thermodenuder operates with minimal loss as the particles never come in direct contact with the active carbon.

Topas TDD 590 brochure


New size-insensitive operation and calibration for the Pegasor PPS-M sensor

An optimized ion trap setting and a new calibration for automotive exhaust make the PPS-M particle mass results independent on particle size. Juha Tikkanen, VP Sales&Marketing of Pegasor, explained that, "Recent work by Pegasor has shown that by applying optimized trap voltages, in order to remove part of the ultrafine particles, the PPS-M mass reading becomes insensitive to particle size in all automotive applications (GDI, diesel, downstream DPF). "Knowing that particle size varies with engine type and operating condition this feature is very important for the most accurate particle mass emission measurements. Pegasor has patent pending for this technology. Another calibration enables the measurement of total particle number with very good correlation to PMP systems. The features mentioned will be implemented in the PPS software 2.0 released during week 26.


More information can be found in the press release from Pegasor or in an article at DieselNet. 


Pegasor press release                DieselNet article


New bipolar charge analyser, BOLAR, from Dekati

The electrical charge carried by inhalation aerosols has been found to affect device performance and lung deposition of both Dry Powder Inhalers (DPI) and Metered Dose Inhalers (MDI). The Dekati ELPI™  (Electrical Low Pressure Impactor) has been widely used to determine the charge size distribution of inhalation aerosols. However, where the ELPI method gives the net charge of the particles, the new Dekati Bipolar Charge Analyzer (Dekati BOLAR™) is the first commercially available instrument capable of measuring bipolar electrical charge size distribution of inhalation aerosols. Until now, the measurement of size classified bipolar electrical charge levels has not been possible, which make the Dekati BOLAR™ a completely unique tool for inhaler device development. The Dekati BOLAR™ can separate positively and negatively charged particles in different size fraction and detect each fraction individually.


More information can be found in the press release from Dekati and in the BOLAR™ brochure. 


Dekati press release on BOLAR                     BOLAR  brochure