Pegasor Particle Sensor PPS-G2
The PPS-G2 is a maintenance-free, real-time sensor for measuring Particle Number (PN) and Mass (PM) in raw exhaust. Designed for OEM integration, it is certified by PTB, NMI and METAS for nPTI applications.
The Pegasor PPS-G2 is the next-generation particle sensor offering real-time monitoring of particle concentration and size. The sensor was first developed for vehicle emission testing, and today it is available for all industrial measuring and monitoring applications where reliability, accuracy and ease of use are required. The PPS-G2 is specifically designed for OEM applications and it comes with a range of data communication and other integration features that can be modified according to customer specific needs. With thousands of PPS-G2 sensors deployed in the market already, we can assure the availability of the sensor is even in large quantities.
Pegasor’s patented PPS-G2 sensor combines diffusion charging with escaping current technology which allows long-term, reliable, and accurate monitoring of ultrafine particles. With this unique technology, the sample flows through the sensor without being collected inside the system enabling very long maintenance intervals even in high concentration measurements. The PPS-G2 sensor measures particle number PN, lung deposited surface area (LDSA) and mass concentrations, and additionally gives information on the median size of measured particles – all in one system!
The Pegasor PPS-G2 sensor is a robust and durable choice, and it can even be heated to detect particles directly in high temperature conditions. The sensor requires minimal maintenance and no attention from the user during use, as the built-in self-diagnostics ensure reliable results. All these features make the G2 sensor an ideal choice to monitor ultrafine particles even in the harshest environments and conditions.
Particle sensor G2 features
- PN, LDSA, PM concentration and particle size measurement
- Simple and robust structure – no moving parts, no need for working fluids
- Flow-through design – no clogging of the sensor and long maintenance intervals
- Extremely high time resolution and response time of 0.2 s
- No dilution required – direct measurement of hot sample
- Option to heat the sensor module up to 200° C to prevent condensation
- Option to add an integrated VPR for volatile particle removal
- Easy OEM integration – variety of data communication options available
- Extensive self-diagnostic system to increase reliability
- Large dynamic range suited to a range of applications
- Sensitive measurement method suitable for low concentration measurements
| Range | 30 – 100 000 000 #/cm³ |
| Particle Size | 10 nm – 1 μm for PN and LDSA. 10 – 200 nm for PM and Dp. |
| Sampling rate | 1–100 Hz |
| Response time | 0.2 s |
| Sample flow rate | 5.5 lpm |
| Output data | Particle number, LDSA and mass concentration, particle median size, sensor operational parameters |
| Data output options | Serial, USB, Ethernet, CAN-BUS, Modbus |
| Power requirements | 5 VDC, optional heater 230 V or 12/24 V |
| Dimensions | 230 x 110 x 90 mm |
| Weight | 1.4 kg |
| Sample inlet/outlet | 8 mm OD / 6 mm ID conductive tubing |
The Industry Standard for nPTI Integration
The Pegasor PPS-G2 is the leading Particle Number (PN) measurement core for the next generation of Periodic Technical Inspection (nPTI) systems. Engineered specifically for high-volume vehicle inspection, it provides a regulation-ready platform for both Diesel and Gasoline (GDI) exhaust monitoring.
With thousands of units already deployed in officially approved PTI equipment across Europe, the PPS-G2 is a field-proven industrial technology, not a laboratory instrument.
Regulation-Ready & Certified
The PPS-G2 technology is fully aligned with the technical requirements of national nPTI frameworks and has been approved for regulatory use by:
- PTB (Germany)
- NMI (Netherlands)
- Belgium
- METAS (Switzerland)
Key Features for PTI System Manufacturers:
- Fuel-Neutral Measurement: Fully optimized for both diesel soot and ultra-fine gasoline particulates (GDI).
- Integrated VPR & Heating: Built-in Volatile Particle Remover and heating up to 200°C for direct hot exhaust measurement.
- Maintenance-Free Core: Patented flow-through diffusion charging technology requires no working fluids, no moving parts, and no internal filters.
- Industrial Communication: Flexible integration via Serial (RS232), USB, Ethernet, CAN-BUS, or Modbus.
- Extensive Self-Diagnostics: Continuous internal monitoring of charger status, flow, and temperature to ensure measurement validity in workshop environments.
Versatile Applications in Research & Environmental Monitoring
While the PPS-G2 is the benchmark for vehicle inspections, its high sensitivity to ultrafine particles (UFP) and rugged design make it equally effective for specialized monitoring and research:
Environmental & Occupational Health
- Outdoor Air Quality Monitoring: High-sensitivity detection of UFPs in urban environments, roadside stations, and near industrial sites, as recommended by WHO guidelines.
- Indoor Air Quality (IAQ): Real-time monitoring for occupational health in factories, workshops, and cleanroom environments.
- Aviation & Airport Emissions: Measuring non-volatile particulate matter (nvPM) near runways and terminals to assess local air quality impact.
Industrial & Engine Research
- PEMS & RDE: Vibration-insensitive performance for real-world driving emissions and on-road testing.
- Engine & Aftertreatment R&D: Real-time efficiency testing for DPF, GPF, and maritime emission control systems.
- Stack Emission Monitoring: Reliable, long-term monitoring for industrial stacks and large-scale combustion processes
PPS-G2 FAQ
The Pegasor PPS-G2 measures particle number concentration (PN), lung deposited surface area (LDSA), particle mass (PM) and particle size in real time. This allows a single sensor to provide comprehensive information about ultrafine particles across a wide range of monitoring applications.
Yes. The PPS-G2 is certified by PTB (Germany), NMI (Netherlands) and METAS (Switzerland) and is widely used as the particle number measurement core in approved nPTI systems for vehicle inspection.
Yes. The PPS-G2 can be equipped with sensor heating up to 200°C and an integrated volatile particle remover (VPR), allowing direct measurements from hot exhaust and other demanding process streams.
The integrated VPR allows the PPS-G2 to remove volatile droplets directly within the sensor housing. This eliminates the need for external sample conditioning or separate VPR hardware, reducing the overall system footprint, cost, and complexity for OEM integrations.
Yes. The PPS-G2 is designed for both diesel and gasoline direct injection (GDI) vehicles. Its integrated VPR, wide dynamic range and high sensitivity enable reliable measurement of ultrafine particle emissions from both engine types.
In addition to vehicle inspection systems, the PPS-G2 is used in air quality monitoring, industrial emissions monitoring, aviation emissions studies, engine development, particle generation studies and environmental research requiring real-time ultrafine particle measurements.
No. The PPS-G2 uses Pegasor’s patented diffusion charging and escaping current technology and can measure directly from raw exhaust without working fluids, alcohol or radioactive sources.
The PPS-G2 is designed for maintenance-free operation. Because it uses a high-velocity flow-through design, it avoids the soot buildup common in optical or filter-based sensors.
Yes. The PPS-G2 is specifically designed for OEM integration and supports communication interfaces including Serial, USB, Ethernet, CAN-BUS and Modbus. The sensor can also be customized to meet specific integration requirements.
PPS-G2 for OEM integration
The PPS-G2 sensor is engineered for seamless integration into large systems. It comes with a range of data communication possibilities, and our in-house development team is available to customize and adapt the sensor further for specific technological requirements. Pegasor sensors technology is available either as ready-made technology solutions or via licensing agreements to our key partners.