AVL Smart SamplerPLUS

PM measurement made easy

Partial flow dilution system for regulatory particulate matter (PM) measurement of internal combustion- and H2-ICE engines. 

SPCplus background

The AVL Smart SamplerPLUS is a partial flow dilution system intended for gravimetric sampling of exhaust particulates from internal combustion engines under both steady state and transient conditions. It has been approved for the transient and steady state testing of particulate matter by both the EPA under CFR 1065, 1066 and the EU under ISO 16183, ECE regulation No. 49 and Global Technical Regulation No. 4 (EU III-VI).
The AVL Smart SamplerPLUS is the result of 40 years of experience in partial flow dilution and particulate measurement with an installed base of over 700 units in 25 different countries.

The emissions of particulates from internal combustion engines are globally restricted by local regulatory bodies, each with slightly different measurement methodologies and acceptance criteria. The various regulations share a common requirement that the mass of particulates must be measured and reported as an input for engine certification. 
What is particulate matter?
Particulate matter (PM) is formed when exhaust gas from internal combustion engines mixes with ambient air. Under these conditions, the combustion products present in the exhaust (soot, hydrocarbons, sulfates, nitrates, and ash) form particulates of various sizes via processes of adsorption, condensation, and agglomeration.

Smart SamplerPLUS inside
Heavy Duty Engines

The initial reason of existence for the Smart SamplerPLUS with over 40 years of improvements incorporated into a single product.

Light Duty Vehicle Testing

US CFR 40, 1066 added another field of application. The Smart SamplerPLUS software and hardware were adapted to be compliant.

Off Road Testing

An application nearly as old as the Smart SamplerPLUS. Flexible design supports large engines testing in every situation.



Practical Applications

A partial flow dilution system such as the AVL Smart SamplerPLUS mixes and dilutes a small sample of the exhaust flow with air under controlled conditions. This allows particulates to form in a repeatable manner simulating reactions in the atmosphere. The system samples the diluted exhaust over a filter medium where the particulates are captured and subsequently weighed. A partial flow system operates on a principle similar to a full flow constant volume system, but the partial flow system dilutes only a fraction of the total exhaust flow, while a CVS (constant volume sampler) dilutes the entire exhaust flow.

Its flexible design also allows the AVL Smart SamplerPLUS to be used as a diluter for particle counting according to ECE regulation No. 49 and Global Technical Regulation No. 4. For particle counting, the system operates as it does for gravimetric measurement with a proportional sample of the diluted exhaust diverted to an optional particle counting device.
•    Easy installation in combination with the AVL Particle Counter
•    Software automation takes care of all the controls and calculations
•    Easy integration into automation system with a wide set of AK commands

 System Operating Parameters

Transformation time (t50)

<150 ms with 2 m interconnect
<240 ms with 12 m interconnect

Exhaust temperature range

25 – 500 °C
(800 °C with optional pressure reduction unit)

Exhaust pressure range

Ambient pressure ± 12 millibar (no pressure pulsation)
0–1,000 millibar gauge with high pressure option
WNTE test compliant

Altitude simulation

3,500 m full loading capacity and 5,500 m limited loading capacity

Flow accuracy

Gp ≤ 5 % at dilution ratios <20
Gp ≤ 2 % at dilution ratios <5

Flow range over filter 0.5 g/s - 2.0 g/s
Flow controllability

From dilution ration 1:1 - 120:1

Filter holder

For up to 4 single filters



AVL Smart SamplerPLUS

Benefits of gravimetric particulate matter sampling. 

Compliant with Emission Regulations

Compliant with EURO VI for particle mass and number counting (add-on sampling) and compliant with EPA CFR 1066 chassis dyno testing and CFR 1065 heavy duty testing.

Flexible Filters  

One to four separated filters and an automatic filter changer that enables the sampling of up to 21 filter pucks for automated test runs while providing increased safety. 

Efficient Operation

The Smart Sampler’s highly efficient control of flow accuracy and stability coupled with low power and shop air consumption can save up to 70 % of ownership costs.

High Testbed Uptime

LFE and SAO design allow long term measurement stability. Recalibration can be done by simply swapping the master LFE. Alternatively, an external flow measurement device can be connected to the SPC to validate the LFEs. 

Flexible Design 

The flexible design of the AVL Smart Sampler also enables it to be used as a diluter for particle counting according to EU VI and STAGE V. 

Altitude Simulation

The Smart SamplerPLUS contains an extra pump cartridge that allows attitude simulations of up to 3,500 m with full sampling capacity.

Rapid Test Cell Changeovers

The Smart Sampler has several flexible mounting options: trolley mount, remote mount of main cabinet up to 12 m away from filter cabinet and wall mount. These mounting possibilities allow users to fully optimize cramped test cells and enable rapid test cell changeovers.

Automatic Filter Changer

The automatic filter changer allows sampling of up to 21 filter pucks for automated test runs and provides increased safety. 3 test runs can be run consecutively with an additional single filter holder. 

Lower Maintenance Costs

The updated Smart SamplerPLUS  Control Cabinet features a list of hardware enhancements that massively improve the serviceability, accessibility to parts as well as quality of life. Brand new PC and manifolds with better access, push in RTDs as well as new pump module are just a few features that come with the system.

Intuitive Software

The Smart SamplerPLUS software has been completely reworked: It now contains many new features such as flow calibration for enhanced repeatability, an energy usage graph, and completely updated reports for improved readability. The new software features intelligent troubleshooting capabilities that allow for high system uptime.

Lab Management
Lab Management Software Solution

Increase the efficiency and effectiveness of your test lab.

SL Visual

The AVL AMA SL is a exhaust measurement system that is revolutionizing emission testing. It is ideally suited to both research and development applications and certification for all types of engines and fuels.

iGEM 2 Test Automation Solution
AVL iGEM 2™ Test Automation

AVL iGEM 2™ is our cutting-edge test automation solution for your energy and emission testing needs. It delivers high-quality data for certification and R&D testing.

AVL Micro Soot Sensor 2™
AVL Micro Soot Sensor 2

The new standard for transient soot measurement in the exhaust gas of combustion engines as emission legislation and market requirements become more demanding.


The AVL Particle Counter (APC) product family measures the concentration of solid particles even under severe conditions. The “x” in the name “xApp” refers to the multiple number of extreme applications. 

AVL FuelExact™ Mass Flow & PLU
AVL FuelExact Mass Flow PLU

AVL FuelExactTM takes advantage of the well-established and highly precise measurement principles (PLU or Mass Flow) combined with the world’s best fuel temperature control.


The in-vehicle measurement platform supporting all global Real Driving Emission (RDE) test requirements. It is a single platform for every on-road application worldwide.

AVL Creators Expedition
AVL Creators Expedition receives Fraunhofer Corporate Venturing Award

AVL List GmbH has received this year's Corporate Venturing Award from Fraunhofer Institute for Production Technology. 

75 Years Special Edition of FOCUS Magazine
75 Years Special Edition of FOCUS Magazine Now Available

With captivating stories and insightful interviews, we invite you to join us as we embark on the exciting journey of AVL, diving into our rich history and envisioning the endless possibilities ahead.

AVL 75 Years
AVL 75 Years: New Brand Movie out Now

As we have been celebrating 75 years of Reimagining Motion throughout this year, we are thrilled to release our new brand movie, commemorating this remarkable milestone of technology excellence and innovation.

EcoVision Award
AVL received the Global EcoVision Award for achievements in Hungary

AVL List GmbH received the Global EcoVision Award from WKÖ in the presence of Federal Chancellor Karl Nehammer, Federal Minister Martin Kocher, and WKÖ President Harald Mahrer for the achievements in Hungary.

AVL Brain
AVL Records Growth of 18 Percent and Continues to Invest in New and Sustainable Mobility Solutions

AVL generated 1.86 billion Euros in turnover last year – Eleven percent flows into research and development – 60 percent of the turnover is already generated by new technologies.

Reimagining Motion
AVL Mobility Accelerates Ground, Air and Space Technology

Latest projects from Northrop Grumman and Eviation presented at CES

AVL Racetech H2 Engine
AVL RACETECH Builds Hydrogen Combustion Engine for Motorsport

AVL RACETECH, the motorsport department of AVL, presents the prototype of an innovative H2 internal combustion engine. The power unit is a compact, hydrogen-powered 2-liter turbo engine, with intelligent water injection, which achieves a totally new performance level. The first racing engine that AVL RACETECH is developing and building in-house.

Do you have questions or want to work with us?

Our experts are happy to help.

You are currently on the AVL Global Site. Click below if you would like to switch to