Nanoparticle counter for ambient air monitoring with integratable NAFION® aerosol dryer (optional) and high volume flow for up to 2 • 106 particles/cm3 (single count mode)



Nanoparticle counter for ambient air monitoring with integratable NAFION® aerosol dryer (optional) and high volume flow for up to 2 • 106 particles/cm3 (single count mode)

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The Palas® condensation particle counter ENVI-CPC 200 is a CPC for environmental ambient air monitoring. Model 200 is appropriate for high concentrations and offers single particle counting up to 2,000,000 particles/cm3. It can be used for ambient air monitoring without a dilution system.

The ENVI-CPC 200 can be equipped with an isothermal NAFION® aerosol dryer that has no consumables and can be used for months without maintenance. The humidity of the aerosol at the inlet is measured and controlled. Additionally, it has a second pump for the working fluid in order to suck it out of a large butanol reservoir. Due to those features it can operate for months without refilling the fluid reservoir.

The cut-off diameter is, as requested for ambient air monitoring CPCs, at 7 nm. Another advantage is the high aerosol flow rate of 1 l/min which reduces diffusion losses to a minimum. The ENVI-CPC 200 can be equipped with a powerful meteorological sensor that monitors ambient air temperature, pressure, humidity, wind speed, wind direction and precipitation type and intensity. A protective outdoor housing is available.

Envi-CPC Counting Efficiency.png

Fig. 1: Counting efficiency curve of the ENVI-CPC measured at the Leibniz Institute for Tropospheric Research

The control of the volume flow is enabled by an internal flow sensor with accessed long-life membrane pump. Contrary to a control with critical nozzle a contamination of the system does not lead to an drop of the volume flow. This is important especially for long-time measurements in ambient air. Additionally, the volume flow can be calibrated afterwards by the user.

As user interface the ENVI-CPC 200 has a 7“ touch display. For remote and network applications the ENVI-CPC 200 supports a standardised interface with different protocol choices, e.g. Modbus, Bayern-Hessen protocol and features like remote access and data storage in the internet or in an internal network.


  • The unique, patented way of providing the working fluid for unattended operation of months
  • Depending on the sensor used (exchangeable by the user), the ENVI-CPC counts up to 2,000,000 particles/cm3 in count mode
  • Ambient air monitoring without dilution system
  • Integrated computer with 7'' touch screen
  • Intuitive user interface with sophisticated software for data evaluation
  • Integrated data logger
  • Limitless integrated network connectivity that supports remote operation and data storage in the internet
  • Powerful software package


Measurement range (number CN) 2 • 106 particles/cm3 (single count mode)
Measurement range (size) 4 – 5,000 nm
Detection efficiency (at low particle size) D50 = 7 +/- 0.7 nm; D90  < 14 nm
Volume flow 0.9 l/min
Data acquisition Digital, 20 MHz processor, 256 raw data channels
Light source LED: High stability, long-lasting
User interface Touchscreen, 800 • 480 pixel, 7" (17.78 cm)
Weight Approx. 10 kg
Accuracy 5% (Einzelzählmodus)
Response time t90 = 3 s
Operation liquid Butanol
Installation conditions +10 – +30 °C (others on demand)
Interfaces USB, Ethernet (LAN), RS-232/485
Dimensions 33 • 38 • 24 cm (H • W • D)


  • Aerosol Research
  • Environmental measurements
  • Environmental monitoring measurement networks
  • Workplace safety and occupational exposure studies
  • Traffic emission monitoring
  • Health studies
  • Mobile aerosol studies


Brief Description
Brief product description in two-pages as PDF
Product Description
Detailed product description as PDF


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