Nanoparticle counter for ambient air monitoring with integrable NAFION® aerosol dryer (optional) for up to 105 particles/cm3 (single count mode)



Nanoparticle counter for ambient air monitoring with integrable NAFION® aerosol dryer (optional) for up to 105 particles/cm3 (single count mode)

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The Palas® condensation particle counter ENVI-CPC 100 is a CPC for environmental ambient air monitoring. Model 100 is made for tyical concentrations in the atmosphere up to 100.000 P/cm3.

The ENVI-CPC 100 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, the ENVI-CPC 100 uses 2 separate fluid pumps for the circulation of butanol into and back to the reservoir, which can be in size from 1l (20 days) up to 5l (3 month of operation). Easy to be refilled or exchanged.

The cut-off diameter is, as requested for ambient air monitoring CPCs, at 7 nm (CEN/TS 16976, future version at 10nm) (see fig. 1). Another advantage is the high aerosol flow rate of 0.9 l/min which reduces diffusion losses to a minimum. The ENVI-CPC 100 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 100 has a 7“ touch display. For remote and network applications the ENVI-CPC 100 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
  • 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) 1 • 105 particles/cm3 (single count mode), 1 • 105 – 107 particles/cm3 (nephelometric 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% (single count mode), 10% (nephelometric mode)
Response time t90 = 3 s
Operation liquid Butanol
Installation conditions +10 – +30 °C (others on demand)
Interfaces USB, Ethernet (LAN), RS-232/485
Power supply 115 – 230 V, 50/60 Hz
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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