10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Taking Ambient Air Monitoring to the Next Level - Multiple Applications with the Fidas® Technology for Fine and Ultrafine Particles Measurements
FREDERIK WEIS, Stefan Hogekamp, Leander Mölter, Maximilian Weiss, Palas GmbH
Abstract Number: 1687 Working Group: Air Quality in Megacities: from Sources to Control
Abstract Air pollution due to particulate matter and the related negative effects (health problems, economic damages) has become one of the major problems our society is faced with today. In order to be able to investigate and to assess the real exposition of the general public in a comprehensive way, the performance of precise and accurate measurements of particulate matter is an essential part of air pollution control.
The Fidas® sensor applies the well-approved measurement technology of optical light scattering on single particles and is equipped with a polychromatic LED light source with long-term stable output. The scattered light intensity is detected under 90° through a patented aperture technology, thus preventing border-zone error and enabling for precise coincidence detection. The implemented approach allows for an easy field calibration as well as a permanent online-monitoring of the calibration status.
Due to its modular design, the Fidas® sensor technique has been adapted to specific devices to cover a large range of possible applications, which will be highlighted in this presentation. It includes regulatory monitoring of PM2.5 and PM10 in official networks by the type-approved and EN-/MCERTS-certified Fidas® 200, indoor and workplace measurements with the portable Fidas® FROG or due to the lightweight sensor technology also installations on flight robots or drones for assessment of line and area sources are possible. Results from the latest approval campaigns will be presented.
Since the Fidas® sensor delivers also total number concentration and particle size distributions with a high time resolution, this can be valuable for e.g. source appointment, prognosis models or the detection of condensation and droplet formation.
For the monitoring of ultrafine and engineered nanoparticles, the Fidas® is combined with an Universal-SMPS to measure from 8 nm to 40 µm to get a comprehensive picture of the air pollution. The overlapping region of the two systems can then be used for extended characterisation.