Promo® 2000 H

With heating regulation up to 250 °C for welas® aerosol sensors

With heating regulation up to 250 °C for welas® aerosol sensors


Promo 2000 H freigestellt.jpg

Promo® 2000 H

With heating regulation up to 250 °C for welas® aerosol sensors


Depending on the composition of the aerosol to be measured, i.e. the carrier gas component and the particle material, pressure and temperature changes in the carrier gas can significantly influence the particle size distribution, e.g. due to condensation or evaporation.

For this reason, the welas® aerosol sensors welas® 2070 H, HP, 2100 H, HP, 2200 H, HP, 2300 H, HP and welas® 2500 H, HP are equipped with a heatable and, as required, pressure-tight cuvette to ensure isobaric and isothermal sampling into the sensor's measurement volume.

The Promo® 2000 H model variant also offers heating regulation for temperatures up to 250 °C for the aerosol sensors with heatable cuvette.

The Promo® is usually calibrated for the operating volume flow. In the Promo® 2000 H version, regulation of the sampling volume flow is performed independently by the customer taking the temperature and pressure into consideration.


  • Measuring range of 0.2 to 100 µm (4 measuring ranges selectable in one device)
  • Up to four measuring ranges in only one device:
    • 0,2 µm – 10 µm
    • 0,3 µm – 17 µm
    • 0,6 µm – 40 µm
    • 2 µm – 100 µm (additionally for sensors 2300 and 2500)
  • Up to 128 size channels per measuring range
  • Concentration range of 1 particle/cm3 to 106 particles/cm3
  • Calibration curves for different refractive indices
  • Very high and reproducible counting efficiency rate starting at 0.2 µm
  • Pressure-resistant up to 10 bar (optional)
  • Heatable to 250 °C (optional)
  • Optical fibre technology
  • Simple operation with a large touch display
  • Calibration, cleaning and lamp replacement can all be performed independently by the customer
  • External control by RS 232 or Ethernet
  • With analysis software PDAnalyze
  • Optional: Software PDControl for operation as welas® digital available
  • Low maintenance
  • Reliable function
  • Reduces your operating expenses


Interfaces USB, Ethernet, RS232/485, Wi-Fi
Measurement range (size) 0,2 µm – 10 µm
0,3 µm – 17 µm
0,6 µm – 40 µm
2 µm – 100 µm
Size channels Up to 128 (64/decade)
Measuring principle Optical light-scattering
Measurement range (number CN) < 1 • 106 particles/cm3
Time resolution Up to 1 s
Thermodynamic conditions ≤ 250 °C, -100 – 50 mbar
Volume flow 5 l/min
Data acquisition 20 MHz processor, 256 raw data channels, digital
Light source Xenon arc lamp 35 W
Power consumption 100 W
User interface Touchscreen, 800 • 480 Pixel, 7"
Power supply 115/230 V, 50/60 Hz
Housing Table housing, optionally with mounting brackets for rack-mounting
Dimensions 185 • 450 • 315 mm (H • W • D) (19")
Support options
direct remote access, Palas® webserver service
Weight Approx. 8 kg (control unit), approx. 2.8 kg (sensor)
Operating system Windows embedded
Data logger storage 4 GB Compact Flash
Software PDControl, FTControl, PDAnalyze
Installation conditions +5 – +40 °C (control unit)


  • Emission monitoring of installations
  • Control of grinding and classification processes
  • Monitoring of production processes in the food, pharmaceuticals and chemicals industries
  • Testing of complete filters, inertial and wet separators or electrostatic precipitators

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