Concept
Magee Scientific AE33 Aethalometer
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1852/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Magee AE33 Aethalometer | ||
| Definition | An instrument that collects and analyses aerosol particles continuously. It can be used for air quality monitoring; real-time source apportionment; emissions testing; climate change research; health effects research; and combustion research. Air is drawn through a spot on a filter tape at a measured flow rate. The tape is illuminated by light while sensitive detectors measure the intensities of light transmitted through the collecting spot and an un-exposed portion of the tape, acting as a reference. As optically absorbing material accumulates on the spot, the intensity of light transmitted through it gradually decreases. The decrease in light intensity from one measurement to the next is interpreted as an increase in collected material. This increased amount is divided by the known air-flow volume to calculate the concentration. In this model two sample spots are collected from the same input air stream with different accumulation rates and analysed simultaneously. The two results are combined mathematically to eliminate the "Filter Loading Effect" nonlinearity and accurately measure the aerosol concentration. Additionally, the analysis is made at 7 optical wavelengths spanning the spectrum from 370 nm to 950 nm. Increases in optical absorption at shorter wavelengths may be interpreted in terms of the presence of so-called "Brown" carbonaceous material, usually an indicator of emissions from biomass combustion. This instrument can be integrated with other instruments including: Total Carbon Analyzer TCA08 for OC/EC analysis; CO2 and meteorological sensors for additional data; and external pump for high altitude BC monitoring. The measurement wavelengths are: 370, 470, 520, 590, 660, 880 and 950 nm. The air flow set-points are: 2, 3, 4 and 5 LPM. The instrument can function up to 3000m altitude, and temperatures between 10 and 40 degrees Celsius. | ||
| Date | 2022-10-04T10:44:37 | ||
| Identifier | SDN:L22::TOOL1852 | ||
| Note | accepted | ||
| Has Current Version | 1 | ||
| version | 1 | ||
| inScheme | http://vocab.nerc.ac.uk/scheme/SDNDEV/current/ | ||
| Broader | L05:387 |
Aethalometers | Mapping: 1742347 |
| Related | L35:MAN0231 |
Aerosol Co. | Mapping: 1742349 |
B75:ORG00482 |
Magee Scientific Corporation | Mapping: 1742348 | |
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