AVL Micro Soot SensorThe AVL 483 Micro Soot Sensor (Photo Acoustic Soot Sensor PASS) is a system for continuous measurement of lowest soot concentration in the diluted exhaust from IC engines. The device is sensitive for soot without a reasonable interference to other components. The soot concentration is determined directly from the primary measurement quantity. The AVL 483 Micro Soot Sensor works on the photo acoustic principle and the chosen cell design (called the “resonant measuring cell”) allows a detection limit of typically ~ 5 µg/m³.
With the additional option “Conditioning Unit” measurements upstream a Diesel Particulate Filter (DPF) are also possible to evaluate e.g. the efficiency of the DPF.
Your benefits at a glance- Transient measurement of soot concentration [mg/m3]
- Sensitive to soot (not interference to other components)
- Soot concentration determined directly from primary measurement quantity
- High sensitivity (resolution 1 µg/m³, detection limit typically ~ 5 µg/m³)
- High measuring range (0-50 mg/m3)
- Simple calibration
- Low maintenance effort
- Measurements upstream and downstream of DPF (back pressures up to 2000 mbar, temperatures up to 1000°C)
Application- For Diesel- and Gasoline Engines
- On Engine- and Chassis dyno testbeds (directly from CVS tunnel or with option Conditioning Unit)
- Measurement upstream and downstream of particulate filters
- Research & Development
- With Conditioning Unit also applicable for “On board measurement”
MeasurementsThe integrated signal over a transient test correlates well with the insoluble part (mainly black carbon) from the mass on a CVS – Filter.
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- Observing the continuous soot curve makes it possible to specifically reduce emissions to below the required targets over the entire test run
- High sensitivity and measurement value resolution permit transient measurements up to the 5 µg/m³ range therefore allowing measurements downstream of exhaust after treatment systems and particulate filters, for example
- Its high sensitivity makes the AVL solution suitable also for future statutory requirements (e.g. EURO 5 and later)
- High device availability due to very low maintenance
- Easy and flexible integration in an automation system
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- High sensitive transient measurement of soot concentration
- Time Resolution: 10 Hz digital, 100 Hz analog
- Signal rise time: ≤ 1 sec
- Detection limit: < 10 µg/m³, typically ~ 5 µg/m³
- Measuring range: 0 – 50 mg/m³
- Dynamic range: 1 : 5000
- Class 1 Laser Product
This picture shows at first the excellent repeatability from the signal during transient measurement and also the application with and without a particle trap.
Specifications | | | Concentration of soot (mg/m3, µg/m3) in the diluted exhaust gas | | | | | | | | | | | | | | | | | | | | RS232, Digital I/O, Analog I/O, Ethernet | | | | | | | | Adjustable from 2 – 10 and from 10 – 20 | | The actual DR will be displayed with the | | | | | | | | max. ± 3% in the range of DR [2..10], | | max. ± 10 % in the range of DR [10..20] | | | | Input pressure 1 ± 0,2 bar over pressure | | | | | Exhaust gas back pressure | | | | | ± 1000 mbar, but max. 50% of exhaust gas back pressure (intermediate pressure) | | Dep. on pressure, ~ 20 l/min at 1000 mbar | | 90…240V AC, 50/60Hz, 500VA | | Measuring unit: W x H x D ~ 19” x 5HE x 530 mm | | Conditioning unit: W x H x D ~ 19” x 5HE x 530 mm | | | | Conditioning unit: ~ 12 kg |
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