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Cambustion CPMA front view showing touchscreen and operation buttons, transparent top showing centrifuge

CPMA | Centrifugal Particle Mass Analyzer

Re-engineered for 2020

Adopted around the world since 2012, The Centrifugal Particle Mass Analyzer (CPMA) allows direct classification of aerosol by mass:charge ratio, with an unrivalled transfer function.

It has been re-engineered for 2020 as the Mk2 version.

The CPMA uses opposing electrical and centrifugal fields to classify particles, with the ability to vary the electrical field and rotation speed to select different particle masses.

Unique features of the CPMA (see the animation for details) allow a very high transmission efficiency of aerosol particles with the selected mass, making the CPMA attractive for a range of applications.

Cambustion CPMA front view showing touchscreen and operation buttons, transparent top showing centrifuge
Cambustion CPMA 3/4 view showing touchscreen and operation buttons, transparent top showing centrifuge

With a touchscreen display and a variety of interfacing options, the CPMA is self contained, with no setup required- only electrical power needs to be connected before the CPMA can be run. The CPMA can record data to a USB drive, and supports analog and digital interfacing with a variety of CPCs, electrometers and other devices.

The CPMA classifier can easily be dissembled for cleaning by the user, the whole process taking less than 1 hour. All necessary tools are included. This makes the CPMA well suited to high concentration / longer duration experiments, and field or laboratory studies.

The CPMA uses standard sealed bearings, for maintenance free operation.

Traditional Aerosol Mass Measurement

Historically the Differential Mobility Analyzer (DMA) has been used to classify nanoparticles by electrical mobility. This technique has become an internationally accepted standard for ultrafine particle size measurement.

The classification in a DMA depends on the ratio between electrical charge and aerodynamic drag on each particle. Since both of these parameters depend on particle morphology, techniques to calculate ultrafine aerosol mass using DMA measurements have required empirical factors to account for varying particle morphology.

Direct Nanoparticle Mass Measurement

The difficulties associated with morphology and electrical mobility measurement are overcome by techniques which classify based upon aerosol mass directly. A technique which does this by balancing the electrostatic and centrifugal forces on a particle was first described by Ehara et al. in 1996. The APM-3600 and APM-3601 Aerosol Particle Mass Analyzers from Kanomax use these techniques.

Applications of the CPMA

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Cambustion CPMA with top removed, showing gear detail and centrifuge

CPMA Brochure

For more information or a list of publications relating to the CPMA, download a brochure. Please contact Cambustion for further information and prices.

CPMA brochureCentrifugal Particle Mass AnalyzerCPMACentrifugal Particle Mass AnalyzerView more at cambustion.com

Key Application Notes

TitleData TypeDownload FileSizeLast Updated
TitleUse of the Cambustion CPMA for absolute mass calibration of the Single Particle Soot Photometer (SP2)Data TypeApplication noteDownload Filecpma04v02.pdfSize229.82 KBLast Updated
TitleUse of the Cambustion CPMA to provide a mass monodisperse aerosolData TypeApplication noteDownload Filecpma01v01.pdfSize130.02 KBLast Updated
TitleDensity and Mass Mobility Exponent Determination with the CPMAData TypeApplication noteDownload Filecpma02v01.pdfSize170.94 KBLast Updated

Support & downloads

    CPMA Igor Pro toolkit for data presentation

    This utility requires Igor Pro 7 for PC or Mac. It is provided free to the community with no implied warranty. Download the .zip file, unzip and open the README.txt file for details of how to use.

    Data inversion algorithm for CPMA-SP2

    The utility requires Igor Pro 7 for PC or Mac. It is provided free to the community with no implied warranty. Download the .zip file, unzip and open the README.txt file for details of how to use.

Aerosol Flow Meter Accessory

Cambustion also offers an aerosol flow meter accessory for the CPMA. This offers realtime measurement of the aerosol flow (via orifice delta P) and interfaces with the CPMA for power and data output.

Contact Cambustion for more information.

Cambustion aerosol flowmeter
  • knowledgebase

    CPMA Animation

    The CPMA uses opposing electrical and centrifugal fields to classify particles, with the ability to vary the electrical field and rotation speed to select different particle masses.

    Front view of CPMA drive belt and gearing
  • Download

    CPMA Advantages

    Advantages of the Cambustion Centrifugal Particle Mass Analyser.

    Download brochureAdvantages of the CPMADownloadAdvantages of the CPMAView more at cambustion.com

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