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Front view of the AF10 Aerosol Flowmeter

AF10 | Aerosol Flowmeter

Designed for the measurement of particle laden flow

The Cambustion Aerosol Flowmeter is compatible with solid, liquid, and mixed aerosol particles suspended in a wide range of gases.

Unlike other popular flowmeters, the AF10 is not damaged by aerosol particles and it does not modify the properties of the aerosol. It uses the well-established measurement principle of pressure drop across an orifice, with simultaneous measurement of absolute pressure and temperature for density correction.

Thanks to a set of interchangeable orifices, the AF10 covers a wide range of flows (0.1 - 10 lpm) and is suitable for use with many common laboratory instruments, including CPCs.

AF 10 rear panel view
AF10 user interface


The AF10 operates out of the box to measure online aerosol flows for a wide range of applications.

Besides communicating directly with other Cambustion instruments such as the AAC, CPMA and the UDAC, the AF10 integrates seamlessly into many common experimental set-ups, thanks to standard analogue output and Ethernet interfaces.

Power is via USB for portability and convenience, and data can be logged to a USB flash drive for future analysis.

The AF10 can be operated via the intuitive touch-screen interface, or via remote control for more complex experiments. A strong portable case and the ability to run off a standard power bank make it an asset during field campaigns as well.


Almost all aerosol experiments rely on accurately known flow rates to correct measurements or to check that instrumentation is operating correctly.

The AF10 can help improve the accuracy of many such experiments by measuring directly the aerosol flow rate of interest. From use with aerosol classifiers (where the sample flow rate sets the resolution), to monitoring of generators output or CPCs input.

Dilution bridge

Amongst others, the AF10 can be used in dilution bridges, where knowledge of the aerosol flow rate is particularly important to achieve a stable dilution. A widespread issue when using dilution bridges is that the valve exposed to aerosol flow clogs up as particles deposit, causing the dilution to increase over time. Standard gas flowmeters would normally be placed downstream of the HEPA filter in the particle-free flow, but in high dilution applications, accurate measurement of the particle free flow does not allow accurate calculation of the bypass (aerosol) flow due to the large ratio between the flows. It is thus difficult to correct for drift without real-time knowledge of the bypass flow. The AF10 can directly monitor the flow through the aerosol-laden branch, significantly increasing the accuracy in case of high dilution ( Y << X ) and allowing the user to compensate for any drift in the system.

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