Promo® 1000 P

With automatic regulation of sampling volume flow by the aerosol sensors welas® under overpressure up to 10 bar
Depending on the aerosol composition to be measured, i.e., the carrier gas component and the particle material, pressure changes in the carrier gas can significantly influence the particle size distribution, e.g., due to condensation or evaporation.

For this reason, the aerosol sensor welas ® 1100 P and theaerosol sensor welas ® 1200 Pare are equipped with a pressure-tight cuvette to ensure isobaric and isothermal sampling into the sensor's measurement volume.

The Promo®system is usually calibrated for the operating volume flow. As the operating volume flow changes with pressure, it is advantageous for the user if automatic volume flow regulation for the sampling volume flow is provided for in the device.

In the Promo® 1000 P, the pressure of the carrier gas is measured, and the required operating volume flow is automatically set to 5 l/min.


  • Mass flow controller for volume flow regulation
  • Absolute pressure capsule
  • Filter unit to protect the flow rate control

Operation principle

Your special advantages

  • Measuring range of 200 nm to 40 µm (3 measuring ranges selectable in one device)
  • Up to three measuring ranges in only one device:
    • 0.2 µm – 10 µm
    • 0.3 µm – 17 µm
    • 0.6 µm – 40 µm
  • Up to 128 size channels per measuring range
  • Concentration range from < 1 particle/cm3 to 5 • 105 particles/cm3
  • Calibration curves for different refractive indices
  • Very high and reproducible counting efficiency rate starting at 0.2 µm
  • High temporal resolution down to 10 ms
  • PDAnalyze analysis software
  • Calibration, cleaning and lamp replacement can all be performed independently by the customer
  • External control by RS 232 or Ethernet
  • Optional: Software PDControl for operation as welas® digital available
  • Simple operation
  • Low maintenance
  • Reliable function
  • Reduces your operating expenses
  • Applications

    Individual solutions for various industries

    • Determination of the separation efficiency of car interior filters, engine air filters, room air filters, compressed air filters, vacuum cleaner filters, cleanable filters, electrostatic precipitators, oil separators, cooling lubricant separators, wet scrubbers, cyclones and other separators
    • Isothermal and isobaric particle size and quantitative determination, for instance in the automobile, chemical, pharmaceutical and food industries
    • Analysis of fast, transient processes
    • Inspection of smoke detectors
    • Particle formation for cloud formation
    • Emission measurements
    • Immission measurements
    Do you have any further questions?
    Please do not hesitate to contact us.
    Technical features

    In detail

    Measuring principle
    Optical light-scattering
    Measurement range (number C_N)
    < 5 • 105 Partikel/cm3
    Measurement range (size)
    0.2 – 10 µm, 0.3 – 17 µm, 0.6 – 40 µm
    Volume flow
    5 l/min, 1.6 l/min
    Size channels
    Max. 128 (64/decade)
    Time resolution
    ≤ 1 s
    USB, Ethernet (LAN), Wi-Fi, RS-232/485
    User interface
    Touchscreen, 800 • 480 pixel, 7" (17.78 cm)
    Data logger storage
    4 GB Compact Flash
    PDControl, FTControl
    Thermodynamic conditions
    +10 – +40 °C, -100 – 50 mbar
    Data acquisition
    Digital, 20 MHz processor, 256 raw data channels
    Light source
    Xenon Hochdrucklampe 75 W
    Table housing, optional: with mounting brackets for rack-mounting
    Operating system
    Windows embedded
    Power supply
    115 – 230 V, 50/60 Hz
    Installation conditions
    +5 – +40 °C (control unit)
    185 • 450 • 315 mm (H • W • D) (19")
    Control unit: approx. 8 kg, sensor: approx. 18 kg

    More information about Promo® 1000 P

    Brief Description

    Brief product description in two-pages as PDF

    Product Description

    Detailed product description as PDF

    Shopping cart

    Your individual configuration


    (Art-No: 6079keine) - Promo 1000 Control Unit

    (Art-No: 4591keine) - P-Module

    (Art-No: 430keine)

    (Art-No: 713keine) - Optional instruction at Palas

    (Art-No: 5915keine) - System Calibration


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    Total price (net)

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