AVL Micro Soot Sensor 2™

Standards beyond limits

The new standard for transient soot measurement in the exhaust gas of combustion engines. 

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As emission legislation and market requirements become more demanding, the task of optimizing combustion and exhaust aftertreatment systems also becomes more and more complex. The soot content of exhaust gas is an important indicator of combustion quality and particle filter performance. Analysis of this metric helps OEMs develop cleaner engines.

The continuous lowering of emission limits and the global focus on testing using real driving emissions (RDE) results in increased development effort for highly complex exhaust aftertreatment system layouts.
Important tasks such as combustion optimization and exhaust aftertreatment system development require data to be measured with the highest precision. The metric of these development tasks is the soot content of the exhaust gas or on the particle filter, as soot is an important indicator of combustion quality and generally a main contributor to particulate emissions. Therefore, soot is also the key parameter when evaluating the efficiency of a diesel (DPF) or gasoline particle filter (GPF) system, as well as the main measure for the creation and validation of the soot loading model.


Rugged and Robust

The AVL Micro Soot Sensor 2 is the next generation of the industry-standard device for transient soot measurement designed for on-board vehicle use. Employing the photoacoustic measurement principle, soot mass concentration is measured without cross sensitivities to other exhaust gas components. This one metric is used throughout the whole engine development process across various test environments such as engine testbed, chassis dyno and on the road. 

The rugged design, which meets IP34 standards, can tackle the harshest testing conditions at temperatures from -10°C to 45°C and at altitudes up to 5,000 m (with the optional pump unit). With improved system dynamics this advanced soot measurement instrument ensures increased accuracy for the development of filter loading models for DPFs and GPFs.  

Technical Data  

Sensor principle

Photoacoustic measurement principle
Measuring range 0.001 – 150 mg/m³
Display resolution 0.01 μg/m³
Soot detection limit 1 μg/m³
Dilution ratio (DR) Adjustable from 2 to 20
Operating temperature -10 to +45 °C (–30 °C with option)
Operating altitude

Up to 3,000 m (up to 5,000 m
with optional pump module)


MSS2 on board
High Dynamic Testing

Optimized for highly dynamic on-road testing under harsh conditions even beyond RDE boundaries. 

Maximum Simplicity

The very compact dimensions and the comprehensive mounting concept allow for low weight and easy installation.


CAN interface for easy communication with INCA and fast data transfer

Designed for On-Board Measurements

The revolutionary exchangeable sensor unit design enables simple access to all maintenance-relevant parts via a drawer module without the need for tools. 


  • Increased measurement range for GDI cold start applications
  • Improved pneumatics for altitude measurements up to 3,000 m
  • Extended operating temperature range.
  • Improved system dynamics for highly dynamic testing maneuvers.


Full compatibility for seamless system integration to the M.O.V.E iS and iX platform.
Isofix mounting plate and compatibility with existing M.O.V.E mounting options and M.O.V.E Gas PEMS iS Design Hood. 

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

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The AVL Smoke Meter is designed to automatically measure soot content in the exhaust gas of combustion engines. The device meets the requirements of ISO 10054 and ISO 8178-3.

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