The new AVL Micro Soot Sensor Generation MSSplus is a system for continuous measurement of lowest soot concentrations in the exhaust gas from internal combustion engines.

The MSSplus is the only measurement system in the market that is able to measure the concentration of soot directly and without cross-sensitivity to other exhaust components. The MSSplus operates based on the photoacoustic measurement principle. Thanks to the measurement cell design and enhanced electronics of the MSSplus  a particularly low detection limit of 1 μg/m3 in combination with a reduced signal noise is achieved. However, the MSSplus  has not only been refined for low emission measurements, but also for the measurement of raw exhaust gas with the integration of an automated thermophoretic loss compensation (TLC). The TLC function compensates the particle losses resulting from thermophoretic deposition at the sample point and enables an automatic calculation, display and logging of the loss corrected soot signal.

Transient measurement of soot concentration [mg/m3]

Sensitive to soot (not interference to other components)

High sensitivity (resolution 0.01 µg/m3, detection limit 1 µg/m3)

Wide measuring range (1-1000 mg/m3)

Measurements upstream and downstream of DPF (back pressures up to 2000 mbar, temperatures up to 1000°C)