European Facility For Airborne Research

European Facility For Airborne Research May 29, 2022, 11:28

Instrument: Ultra High Sensitivity Aerosol Spectrometer

Name Ultra High Sensitivity Aerosol Spectrometer
Acronym UHSAS
Manufacturer Droplet Measurement Technologies
Manufacturer website
Operated by UNIMAN
Operated onboard

Instrument type

Name Aerosol Spectrometer Probe
Acronym Aerosol Spectrometer

Principle of operation

Measured parameter Aerosol concentration and size distribution spectra
Operating principle

Passive Cavity:
Measures amount of light scattered as aerosol particles cross a laser beam. Particle size determined using Mie theory. The particles are focussed in the field of view by a sheath airstream. Collecting optics arranged such that the probe exhibits a very small lower detection limit. Cannot be used within cloud as measurements contaminated by splashing and/or break-up of cloud droplets.
Condensation Nucleus Counter
Cloud Particle Counter

Measurement(s) Aerosol

Dimension and weight

External dimension 60 x 40 x 20 cm
Weight 31.0


Operating mode In situ






None, mass flow controlled

Operational restriction

Minimal operator input - autoboot/log

Operational requirements

100-240 VAC, 47-63 Hz, 200W

Certification approvals

Certified for BAe 146 operation (Cloud-Physics - Rack
manchester/NCAS), ARSF Dornier and Cessna 182J

Additional information

Access, host and processing



Could also fit on any aircraft having the following characteristics

General description

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