This guidance provides a survey of alternatives for continuous in-situ measurements of suspended particles, their chemical components, and their gaseous precursors. Recent and anticipated advances in measurement technology provide reliable and practical instruments for particle quantification over averaging times ranging from minutes to hours. These devices provide instantaneous, telemetered results and can used limited manpower more efficiently than manual, filter based methods. Commonly used continuous particle particle monitors measure inertial mass, mobility, light absorption and light scattering properites of fine particles.

Project officer: Neil Frank. "May 29, 1998." "EPA-454/R-98-012." Includes bibliographical references (7.1-7.38). Prepared by the Desert Research Institute, University and Community College System of Nevada; the U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards; and the National Oceanic and Atmospheric Administration.