1 INTRODUCTION
1.1 Description
Figure 1. The Aethalometer® Model 633.
The Model 633 represents the “Next Generation” version of the real‐time Aethalometer rack‐ mount instrument to measure Black Carbon (BC) particles in air. Please refer to the original Magee Scientific Aethalometer manual for a full description and background information on the method (http://mageesci.com/images/stories/docs/Aethalometer_book_2005.07.03.pdf).
The Model 633 Aethalometer incorporates scientific and technical advances designed to offer improved measurement performance versus previous versions of the Aethalometer and other BC instruments, user features, communications and interface, and the ability to perform routine performance tests to verify correct operation. Most importantly, the instrument incorporates the patented DualSpot™ measurement method. This provides two significant advantages: elimination of the changes in response due to ‘aerosol loading’ effects; and a real‐ time calculation of the ‘loading compensation’ parameter which offers insights into aerosol optical properties, and has been interpreted in models of aerosol origins and aging.
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