Study and monitor particles smaller than the detection threshold of any CPC. Airmodus A11 Nano Condensation Nucleus Counter system measures particles as small as 1 nm in diameter. It is a complete system consisting of a particle size magnifier, a particle counter and operation software. Airmodus A11 can be used to measure the total number concentration of sub-micron particles, or to learn about characteristics and dynamics of the 1-4 nm particles in real time.

Benefits of the A11

– Detect particles as small as

1 nm in diameter in real time

– Also the electrically neutral particles

– Study the formation and growth of 1-4 nm particles

– Activation spectrum can be used for size or composition information.

– Data inversion in real time

Three operation modes

– Fixed mode: One fixed cut-off* for monitoring the appearance of

nanoparticles.

– Stepping mode: Steps through several user-defined cut-offs*. Use to observe pre-defined size classes.

– Scanning mode: The activation spectrum of 1 – 4 nm* particles in less than 5 minutes

Measurement range 1 – 1000 nm.

50% cut-off selectable: 1.2 – 3.5 nm*

Concentration Calibrated: 0 – 100 000 #/cm3

We recommend using in single particle counting mode: Up to 30 000 #/cm3 in single particle counting mode with coincidence <10%; higher concentrations with Total Scattering Mode Correction

Aerosol sample flow 2.5 lpm

(sample flow to CPC 1 lpm)

Working fluid Diethylene Glycol (>99%) n-Butanol (>99%)

Sample conditions

Pressure: 90 to 105 kPa

Relative humidity: 0 to 95% non-condensing**

Environmental conditions

Temperature: 15oC to 30oC Pressure: 90 to 105 kPa

Relative humidity: 0 to 95% non-condensing

Communication Airmodus A10:

Serial: RS-232

USB: type B connector

Analog out: BNC connector 0 to 10 V for external devices, e.g. controlling of a DMA or ion filter.

AirmodusA20:

Analog in: BNC connector, 0 to 10 V (reading data of external sensor)

Analog out: BNC connector 0 to 10 V, user-selectable function output (linear concentration, also DMA voltage control)

Pulse out: BNC connector

Serial: RS-232

Ethernet: RJ45

USB: type B connector

Both instruments: All communication based on ASCII character-encoding scheme.

Fittings Airmodus A10:

External vacuum: fitting for 1⁄4 in. tubing

External compressed air: fitting for 1⁄4 in. tubing

Inlet: 1/4 in. stainless steel tube

Outlet: 1/4 in. stainless steel tube

Airmodus A20:

External vacuum: 1/4 in. stainless steel tube

Inlet: 1/4 in. stainless steel tube

Software Airmodus A1X software for online data inversion and data acquisition (for Microsoft Windows)

External vacuum requirement

100 – 350 mbar pressure at NTP

External compressed air requirement

1.5 – 2.5 bar at NTP

The air should be free of particles, oil and water (dew point below 0oC); maximum operating pressure is 3.0 bar at NTP.

Power requirements For both instruments:

100 – 240 VAC

max. 320 W

universal AC input/full range

Dimensions and weight

Airmodus A10:290x450x465 (height x width x depth in mm), 17.0 kg

Airmodus A20:260x230x400 (height x width x depth in mm), 10.5 kg

Shipping conditions Temperature: 0 – 40oC

Relative humidity: <95% non condensing

The instrument should be shipped in upright position and should be protected against tremor and blows.

*) Nickel Chromium equivalent activation diameter

**) Above 40% please dry the sample to avoid excess water condensation inside the instruments

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